1. O documento apresenta uma introdução à estatística e econometria, abordando conceitos como correlação, casualidade, teste t de Student e regressão linear múltipla.
2. A parte teórica discute a diferença entre correlação e casualidade e quando usar o teste t, enquanto a parte prática inclui análise descritiva, inferência estatística e regressão.
3. O documento fornece uma base conceitual para entender métodos estatísticos comuns usados em econometria.
1) O documento discute estimação estatística, que envolve usar dados amostrais para fazer inferências sobre parâmetros populacionais. 2) Existem dois métodos para determinar estimadores de parâmetros: o método dos momentos e o método da máxima verossimilhança. 3) Um intervalo de confiança é um intervalo que tem probabilidade especificada de conter o verdadeiro valor do parâmetro, e é usado para estimar parâmetros com mais precisão do que um único valor pontual.
O documento discute programação estruturada, abordando fluxos de controle, diagramas de atividade e regras para estruturação de programas. É apresentada a simbologia para fluxos sequenciais, decisões e repetições, além de exemplos de exercícios para aplicação dos conceitos.
O documento descreve a agenda de uma aula de fundamentos de microeconomia. Inclui o cancelamento e reposição de aulas, palavras-chave sobre os capítulos a serem discutidos, como pensa um economista e modelos econômicos como o fluxo circular de produção e fronteira de possibilidades de produção.
1) O documento é a apresentação do professor Maurício Bugarin para a turma C do curso Fundamentos de Microeconomia.
2) Ele apresenta suas credenciais acadêmicas e áreas de pesquisa, além das expectativas para o curso.
3) O professor também recapitula as "regras do jogo" do curso, incluindo conduta em sala de aula, atendimento, pesos da avaliação e cronograma.
1) O documento discute o problema da inferência na regressão múltipla, incluindo testes de hipóteses sobre os coeficientes e o uso da estatística F.
2) É mostrado um exemplo com dados de mortalidade infantil, onde os coeficientes são testados individualmente usando o teste t e conjuntamente usando o teste F.
3) A análise da contribuição incremental de cada variável é discutida por meio da decomposição da soma dos quadrados do modelo.
Este documento descreve vários modelos de regressão linear múltipla para prever o preço de venda de casas usando diferentes variáveis. Inclui um modelo inicial e modelos subsequentes acrescentando novas variáveis, variáveis logaritimizadas, variáveis quadráticas e interações. Conclui que o modelo inicial sem manipulação de variáveis é mais conservador e viável.
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
1) O documento discute estimação estatística, que envolve usar dados amostrais para fazer inferências sobre parâmetros populacionais. 2) Existem dois métodos para determinar estimadores de parâmetros: o método dos momentos e o método da máxima verossimilhança. 3) Um intervalo de confiança é um intervalo que tem probabilidade especificada de conter o verdadeiro valor do parâmetro, e é usado para estimar parâmetros com mais precisão do que um único valor pontual.
O documento discute programação estruturada, abordando fluxos de controle, diagramas de atividade e regras para estruturação de programas. É apresentada a simbologia para fluxos sequenciais, decisões e repetições, além de exemplos de exercícios para aplicação dos conceitos.
O documento descreve a agenda de uma aula de fundamentos de microeconomia. Inclui o cancelamento e reposição de aulas, palavras-chave sobre os capítulos a serem discutidos, como pensa um economista e modelos econômicos como o fluxo circular de produção e fronteira de possibilidades de produção.
1) O documento é a apresentação do professor Maurício Bugarin para a turma C do curso Fundamentos de Microeconomia.
2) Ele apresenta suas credenciais acadêmicas e áreas de pesquisa, além das expectativas para o curso.
3) O professor também recapitula as "regras do jogo" do curso, incluindo conduta em sala de aula, atendimento, pesos da avaliação e cronograma.
1) O documento discute o problema da inferência na regressão múltipla, incluindo testes de hipóteses sobre os coeficientes e o uso da estatística F.
2) É mostrado um exemplo com dados de mortalidade infantil, onde os coeficientes são testados individualmente usando o teste t e conjuntamente usando o teste F.
3) A análise da contribuição incremental de cada variável é discutida por meio da decomposição da soma dos quadrados do modelo.
Este documento descreve vários modelos de regressão linear múltipla para prever o preço de venda de casas usando diferentes variáveis. Inclui um modelo inicial e modelos subsequentes acrescentando novas variáveis, variáveis logaritimizadas, variáveis quadráticas e interações. Conclui que o modelo inicial sem manipulação de variáveis é mais conservador e viável.
2024 State of Marketing Report – by HubspotMarius Sescu
https://www.hubspot.com/state-of-marketing
· Scaling relationships and proving ROI
· Social media is the place for search, sales, and service
· Authentic influencer partnerships fuel brand growth
· The strongest connections happen via call, click, chat, and camera.
· Time saved with AI leads to more creative work
· Seeking: A single source of truth
· TLDR; Get on social, try AI, and align your systems.
· More human marketing, powered by robots
ChatGPT is a revolutionary addition to the world since its introduction in 2022. A big shift in the sector of information gathering and processing happened because of this chatbot. What is the story of ChatGPT? How is the bot responding to prompts and generating contents? Swipe through these slides prepared by Expeed Software, a web development company regarding the development and technical intricacies of ChatGPT!
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
Creative operations teams expect increased AI use in 2024. Currently, over half of tasks are not AI-enabled, but this is expected to decrease in the coming year. ChatGPT is the most popular AI tool currently. Business leaders are more actively exploring AI benefits than individual contributors. Most respondents do not believe AI will impact workforce size in 2024. However, some inhibitions still exist around AI accuracy and lack of understanding. Creatives primarily want to use AI to save time on mundane tasks and boost productivity.
Organizational culture includes values, norms, systems, symbols, language, assumptions, beliefs, and habits that influence employee behaviors and how people interpret those behaviors. It is important because culture can help or hinder a company's success. Some key aspects of Netflix's culture that help it achieve results include hiring smartly so every position has stars, focusing on attitude over just aptitude, and having a strict policy against peacocks, whiners, and jerks.
PEPSICO Presentation to CAGNY Conference Feb 2024Neil Kimberley
PepsiCo provided a safe harbor statement noting that any forward-looking statements are based on currently available information and are subject to risks and uncertainties. It also provided information on non-GAAP measures and directing readers to its website for disclosure and reconciliation. The document then discussed PepsiCo's business overview, including that it is a global beverage and convenient food company with iconic brands, $91 billion in net revenue in 2023, and nearly $14 billion in core operating profit. It operates through a divisional structure with a focus on local consumers.
Content Methodology: A Best Practices Report (Webinar)contently
This document provides an overview of content methodology best practices. It defines content methodology as establishing objectives, KPIs, and a culture of continuous learning and iteration. An effective methodology focuses on connecting with audiences, creating optimal content, and optimizing processes. It also discusses why a methodology is needed due to the competitive landscape, proliferation of channels, and opportunities for improvement. Components of an effective methodology include defining objectives and KPIs, audience analysis, identifying opportunities, and evaluating resources. The document concludes with recommendations around creating a content plan, testing and optimizing content over 90 days.
How to Prepare For a Successful Job Search for 2024Albert Qian
The document provides guidance on preparing a job search for 2024. It discusses the state of the job market, focusing on growth in AI and healthcare but also continued layoffs. It recommends figuring out what you want to do by researching interests and skills, then conducting informational interviews. The job search should involve building a personal brand on LinkedIn, actively applying to jobs, tailoring resumes and interviews, maintaining job hunting as a habit, and continuing self-improvement. Once hired, the document advises setting new goals and keeping skills and networking active in case of future opportunities.
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
The document provides career advice for getting into the tech field, including:
- Doing projects and internships in college to build a portfolio.
- Learning about different roles and technologies through industry research.
- Contributing to open source projects to build experience and network.
- Developing a personal brand through a website and social media presence.
- Networking through events, communities, and finding a mentor.
- Practicing interviews through mock interviews and whiteboarding coding questions.
Google's Just Not That Into You: Understanding Core Updates & Search IntentLily Ray
1. Core updates from Google periodically change how its algorithms assess and rank websites and pages. This can impact rankings through shifts in user intent, site quality issues being caught up to, world events influencing queries, and overhauls to search like the E-A-T framework.
2. There are many possible user intents beyond just transactional, navigational and informational. Identifying intent shifts is important during core updates. Sites may need to optimize for new intents through different content types and sections.
3. Responding effectively to core updates requires analyzing "before and after" data to understand changes, identifying new intents or page types, and ensuring content matches appropriate intents across video, images, knowledge graphs and more.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...Applitools
During this webinar, Anand Bagmar demonstrates how AI tools such as ChatGPT can be applied to various stages of the software development life cycle (SDLC) using an eCommerce application case study. Find the on-demand recording and more info at https://applitools.info/b59
Key takeaways:
• Learn how to use ChatGPT to add AI power to your testing and test automation
• Understand the limitations of the technology and where human expertise is crucial
• Gain insight into different AI-based tools
• Adopt AI-based tools to stay relevant and optimize work for developers and testers
* ChatGPT and OpenAI belong to OpenAI, L.L.C.
Product Design Trends in 2024 | Teenage EngineeringsPixeldarts
The realm of product design is a constantly changing environment where technology and style intersect. Every year introduces fresh challenges and exciting trends that mold the future of this captivating art form. In this piece, we delve into the significant trends set to influence the look and functionality of product design in the year 2024.
How Race, Age and Gender Shape Attitudes Towards Mental HealthThinkNow
Mental health has been in the news quite a bit lately. Dozens of U.S. states are currently suing Meta for contributing to the youth mental health crisis by inserting addictive features into their products, while the U.S. Surgeon General is touring the nation to bring awareness to the growing epidemic of loneliness and isolation. The country has endured periods of low national morale, such as in the 1970s when high inflation and the energy crisis worsened public sentiment following the Vietnam War. The current mood, however, feels different. Gallup recently reported that national mental health is at an all-time low, with few bright spots to lift spirits.
To better understand how Americans are feeling and their attitudes towards mental health in general, ThinkNow conducted a nationally representative quantitative survey of 1,500 respondents and found some interesting differences among ethnic, age and gender groups.
Technology
For example, 52% agree that technology and social media have a negative impact on mental health, but when broken out by race, 61% of Whites felt technology had a negative effect, and only 48% of Hispanics thought it did.
While technology has helped us keep in touch with friends and family in faraway places, it appears to have degraded our ability to connect in person. Staying connected online is a double-edged sword since the same news feed that brings us pictures of the grandkids and fluffy kittens also feeds us news about the wars in Israel and Ukraine, the dysfunction in Washington, the latest mass shooting and the climate crisis.
Hispanics may have a built-in defense against the isolation technology breeds, owing to their large, multigenerational households, strong social support systems, and tendency to use social media to stay connected with relatives abroad.
Age and Gender
When asked how individuals rate their mental health, men rate it higher than women by 11 percentage points, and Baby Boomers rank it highest at 83%, saying it’s good or excellent vs. 57% of Gen Z saying the same.
Gen Z spends the most amount of time on social media, so the notion that social media negatively affects mental health appears to be correlated. Unfortunately, Gen Z is also the generation that’s least comfortable discussing mental health concerns with healthcare professionals. Only 40% of them state they’re comfortable discussing their issues with a professional compared to 60% of Millennials and 65% of Boomers.
Race Affects Attitudes
As seen in previous research conducted by ThinkNow, Asian Americans lag other groups when it comes to awareness of mental health issues. Twenty-four percent of Asian Americans believe that having a mental health issue is a sign of weakness compared to the 16% average for all groups. Asians are also considerably less likely to be aware of mental health services in their communities (42% vs. 55%) and most likely to seek out information on social media (51% vs. 35%).
AI Trends in Creative Operations 2024 by Artwork Flow.pdfmarketingartwork
Creative operations teams expect increased AI use in 2024. Currently, over half of tasks are not AI-enabled, but this is expected to decrease in the coming year. ChatGPT is the most popular AI tool currently. Business leaders are more actively exploring AI benefits than individual contributors. Most respondents do not believe AI will impact workforce size in 2024. However, some inhibitions still exist around AI accuracy and lack of understanding. Creatives primarily want to use AI to save time on mundane tasks and boost productivity.
Organizational culture includes values, norms, systems, symbols, language, assumptions, beliefs, and habits that influence employee behaviors and how people interpret those behaviors. It is important because culture can help or hinder a company's success. Some key aspects of Netflix's culture that help it achieve results include hiring smartly so every position has stars, focusing on attitude over just aptitude, and having a strict policy against peacocks, whiners, and jerks.
PEPSICO Presentation to CAGNY Conference Feb 2024Neil Kimberley
PepsiCo provided a safe harbor statement noting that any forward-looking statements are based on currently available information and are subject to risks and uncertainties. It also provided information on non-GAAP measures and directing readers to its website for disclosure and reconciliation. The document then discussed PepsiCo's business overview, including that it is a global beverage and convenient food company with iconic brands, $91 billion in net revenue in 2023, and nearly $14 billion in core operating profit. It operates through a divisional structure with a focus on local consumers.
Content Methodology: A Best Practices Report (Webinar)contently
This document provides an overview of content methodology best practices. It defines content methodology as establishing objectives, KPIs, and a culture of continuous learning and iteration. An effective methodology focuses on connecting with audiences, creating optimal content, and optimizing processes. It also discusses why a methodology is needed due to the competitive landscape, proliferation of channels, and opportunities for improvement. Components of an effective methodology include defining objectives and KPIs, audience analysis, identifying opportunities, and evaluating resources. The document concludes with recommendations around creating a content plan, testing and optimizing content over 90 days.
How to Prepare For a Successful Job Search for 2024Albert Qian
The document provides guidance on preparing a job search for 2024. It discusses the state of the job market, focusing on growth in AI and healthcare but also continued layoffs. It recommends figuring out what you want to do by researching interests and skills, then conducting informational interviews. The job search should involve building a personal brand on LinkedIn, actively applying to jobs, tailoring resumes and interviews, maintaining job hunting as a habit, and continuing self-improvement. Once hired, the document advises setting new goals and keeping skills and networking active in case of future opportunities.
A report by thenetworkone and Kurio.
The contributing experts and agencies are (in an alphabetical order): Sylwia Rytel, Social Media Supervisor, 180heartbeats + JUNG v MATT (PL), Sharlene Jenner, Vice President - Director of Engagement Strategy, Abelson Taylor (USA), Alex Casanovas, Digital Director, Atrevia (ES), Dora Beilin, Senior Social Strategist, Barrett Hoffher (USA), Min Seo, Campaign Director, Brand New Agency (KR), Deshé M. Gully, Associate Strategist, Day One Agency (USA), Francesca Trevisan, Strategist, Different (IT), Trevor Crossman, CX and Digital Transformation Director; Olivia Hussey, Strategic Planner; Simi Srinarula, Social Media Manager, The Hallway (AUS), James Hebbert, Managing Director, Hylink (CN / UK), Mundy Álvarez, Planning Director; Pedro Rojas, Social Media Manager; Pancho González, CCO, Inbrax (CH), Oana Oprea, Head of Digital Planning, Jam Session Agency (RO), Amy Bottrill, Social Account Director, Launch (UK), Gaby Arriaga, Founder, Leonardo1452 (MX), Shantesh S Row, Creative Director, Liwa (UAE), Rajesh Mehta, Chief Strategy Officer; Dhruv Gaur, Digital Planning Lead; Leonie Mergulhao, Account Supervisor - Social Media & PR, Medulla (IN), Aurelija Plioplytė, Head of Digital & Social, Not Perfect (LI), Daiana Khaidargaliyeva, Account Manager, Osaka Labs (UK / USA), Stefanie Söhnchen, Vice President Digital, PIABO Communications (DE), Elisabeth Winiartati, Managing Consultant, Head of Global Integrated Communications; Lydia Aprina, Account Manager, Integrated Marketing and Communications; Nita Prabowo, Account Manager, Integrated Marketing and Communications; Okhi, Web Developer, PNTR Group (ID), Kei Obusan, Insights Director; Daffi Ranandi, Insights Manager, Radarr (SG), Gautam Reghunath, Co-founder & CEO, Talented (IN), Donagh Humphreys, Head of Social and Digital Innovation, THINKHOUSE (IRE), Sarah Yim, Strategy Director, Zulu Alpha Kilo (CA).
Trends In Paid Search: Navigating The Digital Landscape In 2024Search Engine Journal
The search marketing landscape is evolving rapidly with new technologies, and professionals, like you, rely on innovative paid search strategies to meet changing demands.
It’s important that you’re ready to implement new strategies in 2024.
Check this out and learn the top trends in paid search advertising that are expected to gain traction, so you can drive higher ROI more efficiently in 2024.
You’ll learn:
- The latest trends in AI and automation, and what this means for an evolving paid search ecosystem.
- New developments in privacy and data regulation.
- Emerging ad formats that are expected to make an impact next year.
Watch Sreekant Lanka from iQuanti and Irina Klein from OneMain Financial as they dive into the future of paid search and explore the trends, strategies, and technologies that will shape the search marketing landscape.
If you’re looking to assess your paid search strategy and design an industry-aligned plan for 2024, then this webinar is for you.
5 Public speaking tips from TED - Visualized summarySpeakerHub
From their humble beginnings in 1984, TED has grown into the world’s most powerful amplifier for speakers and thought-leaders to share their ideas. They have over 2,400 filmed talks (not including the 30,000+ TEDx videos) freely available online, and have hosted over 17,500 events around the world.
With over one billion views in a year, it’s no wonder that so many speakers are looking to TED for ideas on how to share their message more effectively.
The article “5 Public-Speaking Tips TED Gives Its Speakers”, by Carmine Gallo for Forbes, gives speakers five practical ways to connect with their audience, and effectively share their ideas on stage.
Whether you are gearing up to get on a TED stage yourself, or just want to master the skills that so many of their speakers possess, these tips and quotes from Chris Anderson, the TED Talks Curator, will encourage you to make the most impactful impression on your audience.
See the full article and more summaries like this on SpeakerHub here: https://speakerhub.com/blog/5-presentation-tips-ted-gives-its-speakers
See the original article on Forbes here:
http://www.forbes.com/forbes/welcome/?toURL=http://www.forbes.com/sites/carminegallo/2016/05/06/5-public-speaking-tips-ted-gives-its-speakers/&refURL=&referrer=#5c07a8221d9b
ChatGPT and the Future of Work - Clark Boyd Clark Boyd
Everyone is in agreement that ChatGPT (and other generative AI tools) will shape the future of work. Yet there is little consensus on exactly how, when, and to what extent this technology will change our world.
Businesses that extract maximum value from ChatGPT will use it as a collaborative tool for everything from brainstorming to technical maintenance.
For individuals, now is the time to pinpoint the skills the future professional will need to thrive in the AI age.
Check out this presentation to understand what ChatGPT is, how it will shape the future of work, and how you can prepare to take advantage.
The document provides career advice for getting into the tech field, including:
- Doing projects and internships in college to build a portfolio.
- Learning about different roles and technologies through industry research.
- Contributing to open source projects to build experience and network.
- Developing a personal brand through a website and social media presence.
- Networking through events, communities, and finding a mentor.
- Practicing interviews through mock interviews and whiteboarding coding questions.
Google's Just Not That Into You: Understanding Core Updates & Search IntentLily Ray
1. Core updates from Google periodically change how its algorithms assess and rank websites and pages. This can impact rankings through shifts in user intent, site quality issues being caught up to, world events influencing queries, and overhauls to search like the E-A-T framework.
2. There are many possible user intents beyond just transactional, navigational and informational. Identifying intent shifts is important during core updates. Sites may need to optimize for new intents through different content types and sections.
3. Responding effectively to core updates requires analyzing "before and after" data to understand changes, identifying new intents or page types, and ensuring content matches appropriate intents across video, images, knowledge graphs and more.
A brief introduction to DataScience with explaining of the concepts, algorithms, machine learning, supervised and unsupervised learning, clustering, statistics, data preprocessing, real-world applications etc.
It's part of a Data Science Corner Campaign where I will be discussing the fundamentals of DataScience, AIML, Statistics etc.
Time Management & Productivity - Best PracticesVit Horky
Here's my presentation on by proven best practices how to manage your work time effectively and how to improve your productivity. It includes practical tips and how to use tools such as Slack, Google Apps, Hubspot, Google Calendar, Gmail and others.
The six step guide to practical project managementMindGenius
The six step guide to practical project management
If you think managing projects is too difficult, think again.
We’ve stripped back project management processes to the
basics – to make it quicker and easier, without sacrificing
the vital ingredients for success.
“If you’re looking for some real-world guidance, then The Six Step Guide to Practical Project Management will help.”
Dr Andrew Makar, Tactical Project Management
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...Applitools
During this webinar, Anand Bagmar demonstrates how AI tools such as ChatGPT can be applied to various stages of the software development life cycle (SDLC) using an eCommerce application case study. Find the on-demand recording and more info at https://applitools.info/b59
Key takeaways:
• Learn how to use ChatGPT to add AI power to your testing and test automation
• Understand the limitations of the technology and where human expertise is crucial
• Gain insight into different AI-based tools
• Adopt AI-based tools to stay relevant and optimize work for developers and testers
* ChatGPT and OpenAI belong to OpenAI, L.L.C.
1. UNIVERSIDADE EDUARDO MONDLANE
Faculdade de Ciências
Deparamento de Matemática e Informática
vi™en™i—tur— em ist—tísti™—
i™onometri—
Análise de Regressão linear múltipla - Extensão à
outras formas funcionais
ho™enteX
hrF rerl—nder x—mui™heD ws™F
his™entesX
eri—no wilh—res w—tinoY
pern—ndo em—r—l pilipe tuniorY
€into pern—ndo wudum˜eY
yrnelle toel xh—™—
w—putoD w—rço de PHIS
2. UEM-DMI Trabalho prático I - Econometria P
Conteúdo
1 Parte I: Teoria 3
IFI gorrel—ção vsF g—su—lid—de F F F F F F F F F F F F F F F F F F F F F F F F F F F Q
IFP O facto de que 50% dos pacientes internados no hospital X morrerem im-
plica que o hospital esteja a trabalhar mal. F F F F F F F F F F F F F F F F F Q
IFQ „este t @studentA F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F R
IFQFI gon™eito F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F R
IFQFP u—ndo us—r o teste F F F F F F F F F F F F F F F F F F F F F F F F F F R
IFQFQ g—r—™teristi™—s F F F F F F F F F F F F F F F F F F F F F F F F F F F F F R
IFQFR irros envolvidos F F F F F F F F F F F F F F F F F F F F F F F F F F F F F R
IFQFS ‚egr— α e v—lor ™rití™o F F F F F F F F F F F F F F F F F F F F F F F F F S
IFQFT „este unil—ter—l vsF fil—ter—l F F F F F F F F F F F F F F F F F F F F F F T
IFR invies—mento vs gonsistên™i— F F F F F F F F F F F F F F F F F F F F F F F F F T
IFS welhor estim—dor vine—r não envies—do F F F F F F F F F F F F F F F F F F F T
2 Parte II: Prática 8
PFI enálise dis™ritiv— F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F V
PFP snferên™i— est—tísti™— F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F W
PFQ enálise de ‚egressão F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F W
3 Códigos em STATA 13
3. UEM-DMI Trabalho prático I - Econometria Q
1 Parte I: Teoria
1.1 Correlação vs. Casualidade
ys ™on™eitos de ™orrel—ção versus ™—su—lid—de são o tópi™o se não o —ssunto de v—ri—s
dis™ussões —™tu—lment— n— est—tísti™—F e™orrel—ção entre du—s v—riáveis ou eventos
não impli™— ne™ess—ri—mente um— rel—ção de ™—su—lid—deD ou sej—D o eento e ™—usou —
o™orrên™i— de f @vi™eEvers—AF xo ent—nto há que sustenter o f—™to de que se dois eventos
ou v—riáveis —present— um— rel—ção de ™—su—lid—de os mesmos são t—m˜ém ™orrel—™ion—dos
@re™ipro™o não é válidoAF
Conceito 1 (Correlação) refere-se a parte comun ou seja a ligação que um par de dados
ou eventos têm em comun.
Conceito 2 (Casualidade) se um par de dados ou eventos apresenta correlação, isto é
se A e B são correlacionados e A (B) é sucientemente capaz de explicar B (A), então os
dois pares apresenta uma relação de casualidade.
he form— — sustent—r os ™on™eitos —™m— tomemos o seguinte exemploX tom—Ese um— —mostr
de pesso—sD —not—Ese o número diário de hor—s que —s pesso—s veem televisão e medeEse os
seus pesos e —ltur—sF gheg—Ese — ™on™lusão de que existe um— rel—çãoentre —s du—s v—riáveisD
4quanto mais horas cam diante de TV, mais obesas sãoF ixiste um— relção m—temáti™—
entre o número de hor—s n— „† e o ex™esso de pesoF
im˜or— que ver „† estej— ™orrel—™ion—do — o˜esid—deD não é su(™iente per— inferir
que um @—A ™—us— o outro @—AD poisD existirão outros f—™tores diferentes dos já men™ion—dosF
1.2 O facto de que 50% dos pacientes internados no hospital X
morrerem implica que o hospital esteja a trabalhar mal.
e —(rm—ção em —nálise vem sustent—r — —rgument—ção feit— no exer™i™io —nteriorD pelo
que não ™on™ord—mos ™om — mesm—F é de se f—zer referên™i— — existên™i— de um— rel—ção
entre —m˜os —spe™tosF xo ent—nto p—r— —(rm—mos um— situ—ção de ™—su—lid—de há que
lev—r em ™onsider—ção outros f—™tores que poss—m est—r envolvidos n— morte dos p—™ientesF
4. UEM-DMI Trabalho prático I - Econometria R
1.3 Teste t (student)
1.3.1 Conceito
„r—t—Ese de um teste de hipótese que us— ™on™eitos est—tísti™os p—r— rejeit—r ou não um—
hipótese nul—D desde que o o˜je™to de teste sig— distri˜uição t de studentF
1.3.2 Quando usar o teste
• u—ndo não se s—˜e o desvio p—drão d—s popul—çõesY
• sdenti(™—r o t—m—nho d— áre— o˜tid— — p—rtir d— função de densid—de de pro˜lem—
d— distri˜uição t de studentY
• g—l™ul—r o v—lor d— v—riável tF
1.3.3 Caracteristicas
e distri˜uição t é um— distri˜uição de pro˜—˜ilid—de teóri™—F É simétri™—D ™—mp—niformeD
e semelh—nte — distri˜uição norm—l p—drãoD porém ™om ™—ud—s m—is l—rg—sD ou sej—D um—
simul—ção de t de student pode ger—r v—lores m—is extremos que um— simul—ção d— norm—lF
y úni™o p—râmetro v que de(ne e ™—r—™teriz— — su— form— é o número de graus de liberdadeF
u—nto m—ior for esse p—râmetroD m—is próximo d— norm—l el— seráF
1.3.4 Erros envolvidos
Natureza do estado
ripótese nul— é verd—deir— ripótese nul— é p—ls—
se ™on™lui que H0 é †erd—deir— he™isão ™orre™t— irro do „ipo ss
he™isão @xão rejeit—r H0A
se ™on™lui que H0 é p—ls— irro do tipo s he™isão gorre™t—
@‚ejeit—r H0A
„—˜el— IX u—dro de™isório
hevido —o poten™i—l erro —mostr—lD dois possíveis erros podem o™orrer —o f—zer o teste
de hipoteses ™om ˜—se no teste „F esses erros mostr—m — rel—™—ção entre o —™tu—l est—do e
— de™isão — o˜ter —tr—véz d— —mostr—F
5. UEM-DMI Trabalho prático I - Econometria S
essim ™omo qu—lquer outro testeD —o não rejeit—mos — hiótese nul— em momento —lgum
isso signi(™—ri— 4—™eit—r — hipotese4D pelo que no (m — noss— ™on™lusão deve ™onsistir
em rejeit—r@não rejeit—rA — hipotese nul—F f—l—r do teste „ qu—nto — rejeição ou não d—
hipótese nul— f—zEse refeên™i— —™er™— d— su— ro˜ustez no que t—nge —o erro do tipo sF im˜or—
o mesmo sej— sugerido —pli™—r ™om o não ™onhe™imento d— v—riân™i— popul—™ion—l um
—umento signi(™—tivo d— —mostr— ™onduzEnos — um— ro˜utez quer p—r— o erro do Tipo I
—ssim ™omo do Tipo IIF
1.3.5 Regra α e valor critíco
y o˜je™tivo do teste de hipóteses e f—zer o uso d— inform—ção ™ontid— n— —mostr— pr—
di™idir se rejeit—mos ou n£q—o — hipoteEse nul— so˜re o p—râmetro poupul—™ion—lF xo ent—nto
— mesm— de™isão ˜—sei—Ese em um— regr— —ssente no tipo de distri˜uição em ™—us—F
Conceito 3 (nível de signicância (α)) É a probabilidade maxima adimissivel de co-
meter o erro do tipo I
Conceito 4 (Valor crítico) É o valor correspondente ao nível de signicância que de-
termina se o teste estatístico tem como respósta a rejeição ou não da hipótese nula.
• ƒe o v—lor do tcalculado em —˜soluto for superior —o v—lor do tcrtico ™om ˜—se —o nível
de signi(™ân™i— es™olhido não rejeit—Ese H0F
• ƒe o tcalculado em —˜soluto for infriorimente igu—l —o tcrtico ˜—sei—do no nível de signiE
(™ân™i— rejeit—mos H0
Conceito 5 (p-value) O p-value (valor de probabilidade), associado ao valor calculado do
teste estatístico é denido como o mais baixo nível de signicância com o qual a hipótese
nula pode ser rejeitada, dado o valor calculado teste em causa.
• ƒe o pEv—lue ™—l™ul—do p—r— — —mostr— é menor que o nível de signi(™ân™i— es™olhido
αD rejeit—Ese — hipoteEse nul— — esse nível de sigini(™ân™i—F
pEv—lue ` α =⇒ rejeit—r H0 — esse nível de signi(™ân™i—F
• ƒe o pEv—lue ™—l™ul—do p—r— — —mostr— é m—ior ou igu—l —o nível de signi(™ân™i—
es™olhido α m—ntenEse @iFeF há não rejeição de H0A — esse nível de signi(™ân™i—F
pEv—lue ≥ α =⇒ m—ntenEse H0 — esse nível de signi(™ân™i—
6. UEM-DMI Trabalho prático I - Econometria T
1.3.6 Teste unilateral vs. Bilateral
Conceito 6 (Unilateral) Verca-se tal situação se a região de rejeição está somente em
uma das caudas de rejeição. H0 : µ1 = µ2 vs. H1 : µ1 ()µ2
Conceito 7 (Bilateral) Verca-se tal situação se a região de rejeição se distribui igual-
mente em ambas as caudas de distribuição. H0 : µ1 = µ2 vs. H1 : µ1 = µ2
essimD se estivermos interess—dos em mostr—r que um p—râmetro é signi(™—tiv—mente
superior ou inferior — um determin—do v—lorD teremos que re—liz—r um teste unil—ter—l e
teremos um— úni™— região de rejeiçãoD do t—m—nho do nível de signi(™ân™i— (x—doF w—s seD
no ent—ntoD estivermos interess—dos em mostr—r que um determin—do p—râmetro é diferente
de um determin—do v—lor @sem espe™i(™—r se inferior ou superiorA teremos que re—liz—r um
teste ˜il—ter—l e — região de rejeição será dividid— em du—s p—rtes igu—isD n—s extremid—des
d— ™urv— do testeD em que ™—d— região de rejeição terá met—de do nível de signi(™ân™i—F
1.4 Enviesamento vs Consistência
hizer que um estim—dor é envies—do signi(™— que — su— distri˜uição não está ™entr—d— em
volt— do p—râmetro de interesseF
E(ˆβ) = βF
…m estim—dor ™onsistente é —quele que — su— distri˜uição (™— tot—lmente ™entr—d— —o
p—râmetro popul—™ion—l qu—ndo —ument—mos o t—m—nho d— —mostr—D isto éD qu—ndo n tende
p—r— o in(nito Xlim(ˆβ) = βF …m— ™ondição p—r— que isso —™onteç— @™ondição ne™essári— m—s
não su(™ienteA é port—nto que V ar(ˆβ) = 0 n −→∝F
…m— not— import—nte é que um estim—dor pode ser envies—do m—s se ™om o —umento
do t—m—nho n— —mostr— nD ele (™— ™entr—do dizemos que é ™onsistenteD port—ntoD não há
nenhum— interdependên™i— entre —s du—s propried—desF
1.5 Melhor estimador Linear não enviesado
essumindo que os v—lores xIDFFFDxn sej—m ™onhe™idos e (xosF i —ind— v—lores yIDFFFDyn
o˜serv—dos de v—riáveis —le—óri—s não ™orrel—™ion—d—s ‰IDFFFD‰nF e rel—™ão line—r —ssumid—
7. UEM-DMI Trabalho prático I - Econometria U
entre —s v—riáveis x9s e y9s éX
EYi = α + βxi
D i = 1, · · · , n
™om v—riân™i— V arYi = σ2
xão existe ™on™ordân™i— em σ2
porque de —ntemão —ssumimos que p—r— todos YisD teE
mos — mesm— v—riân™i— @des™onhe™id—AF —s suposições —™er™— dos dois primeiros momentos
dos Yis são —s uni™—s suposições ne™essári—s de modo — pro™eder ™om — deriv—çãoF
€or exemplo não pre™is—mos espe™i(™—r — distri˜uição de pro˜—˜ili—dde p—r— os YisF o
mesmo modelo pode ser es™rito —ssumindo — existên™i— de f—™tores não mensur—dos pel—s
v—riáveis que o ™ompõemD isto e¡X
EYi = α + βxi
+ εiD i = 1, · · · , n
™om V arεi = σ2
e Eεi
= 0
ys erros são —le—tóriosF desde que Yi depend—m dos erros e os mesmos não ™orrel—™iE
on—dosD os Yi são t—m˜ém não ™orrel—™ion—dosF im sum—D —o ™onstruir estim—dores p—r—
α e βD restringimos — —tenção — ™l—sse dos estim—dores line—resF
ys estim—dores serão 4melhores4D se tiverem — menor v—riân™i— entre todos os estiE
m—dores não envies—dosF ƒimil—rmente serão ™onsider—dos os β9s em wy os melhores
estim—dores line—res não envies—dos @fv…i E ˜est line—r un˜i—sed estim—torA se tr—t—rEse
do estim—dor line—r ™om in(m— v—riân™i— de entre os dem—isF
8. UEM-DMI Trabalho prático I - Econometria V
2 Parte II: Prática
2.1 Análise discritiva
†—ri—˜le y˜s we—n ƒtdF hevF win w—x
pri™e QPI WTIHHFTT RQPPQFUQ PTHHH QHHHHH
„—˜el— PX hes™rição d— v—riável preço
ys v—lores —™im— lev—mEnos — ™rer n— possível existên™i— de v—lores —típi™os —o que
t—nge —o preço d—s ™—s—s pois p—r— um— médi— WTIHHFTT em˜or— m—ior que o preço minímo
existe em ™ontr—p—rtid— um v—lor rel—tiv—mente —lto p—r— o preço m—xímo o que nos lev—
— ™rer que — de(nição do mesmo lev— em ™ont— vários f—™toresF
IWUVD
IWVI preqF
IWUV IUW
IWVI IRP
„—˜el— QX xúmero de ™—s—s vendid—s por —no
ys result—dos em „—˜el— QD mostr—m ™l—r—mente que — vend— de ™—s—s foi m—ior em
IWUVF
b ye—r a IWUV
†—ri—˜le y˜s we—n ƒtdF hevF win w—x
pri™e IUW UTTPVFHR QHTPTFRR PTHHH QHHHHH
b ye—r a IWVI
†—ri—˜le y˜s we—n ƒtdF hevF win w—x
pri™e IRP IPHTRUFI RRQSWFVW RIHHH PUHHHH
„—˜el— RX hes™rição dos perços por —no de vend—
ys result—dos mostr—m que em IWUV vendeuEse m—is ™—s—s — um preço rel—tiv—mente
m—ior em ™omp—r—ção —o —no de IWVI quer em v—lores médios —im ™omo ™omp—r—ndos os
seus v—lores m—xímos de vend—F †—lores referentes —o desvio p—drão lev—m — ™rer que —s
9. UEM-DMI Trabalho prático I - Econometria W
™—s—s em˜o˜or— ™om m—ior número de vend—s est—v—m rel—tiv—mente m—is ™—r—s qu—ndo
™omp—r—do —o —no de IWVIF
2.2 Inferência estatística
ƒej— n = 321D µ = 96100.66 Dσ = 43223.73D α = 0.05 test—ndoX
H0X y preço médio de vend— d—s ™—s—s do ™onjunto de d—dos não é diferente de 6IHHFHHH
H1X y preço médio de vend— em o ™onjunto de d—dos é menor que 6IHHFHHHF
tcalculado =
µteste − µ
σ2
n
essim tcalculado = 1.6162 o que — um α = 0.05D o˜serv—Ese que tcalculado = 1.6162 menor
que tcritco = 1.649614D deste modo não rejeit—mos — hipótese nul— de que y preço médio de
vend— d—s ™—s—s do ™onjunto de d—dos não é diferente de 6IHHFHHHF
egor— im—ginemos — possi˜ilid—de de ™omp—r—ção d— médi— dos preços de vend— p—r—
os dois —nos —o mesmo nível de signi(™ân™i— (x—do —nteriorimenteX
qroup y˜s we—n ƒtdF irrF ƒtdF hevF ‘WS7 gonfF snterv—l“
IWUV IUW UTTPVFHR PPVWFIPV QHTPTFRR UPIIHFUP VIIRSFQT
IWVI IRP IPHTRUFI QUPPFT RRQSWFVW IIQPVUFV IPVHHTFS
™om˜ined QPI WTIHHFTT PRIPFSIQ RQPPQFUQ WIQSRFPU IHHVRUFI
di' ERRHIWFHW RIWRFSQ ESPPUIFSQ EQSUTTFTT
„—˜el— SX „este t p—r— diferenç—s d—s médi—s
roX di' a H vs r—X di' 3a H t a EIHFRWRR €r@|„| b |t|A a HFHHHH
€elos result—dos em „—˜el— SD existêm evidên™i—s su(™ientes p—r— — reijeção d— hótese
nul—D isto é — médi— dos preços de vend— de ™—s—s p—r— os dois —nos é diferenteF
2.3 Análise de Regressão
„endo em ™onsider—ção—s v—riáveis em —nálise —s que supost—ente podêm ter in)uên™i—
so˜re o preço de vend— sãoX
10. UEM-DMI Trabalho prático I - Econometria IH
• sd—de d— ™—s— @—geAY
• xúmero de qu—rtos n— ™—s— @roomsAY
• e distân™i— —té — termin—l de tr—nsportes @™˜dA
es v—riáveis es™olhid—s são — primeir— instân™i— sus™eptíveis — —ument—r o preço d— ™—s—F
xo ent—nto o mesmo não se pode dizer —™er™— d— v—riável 4—ge4D pois é de esper—r que ™—s—s
™om menor id—de estej—m m—is ™—r—s em rel—ção —s de m—ior id—deF wesm— —nálise podeEse
esper—r d— v—riável 4™˜d4D poisD qu—nto menor for — distân™i— d— ™—s— —té — termin—l de
tr—nsportes m—ior será o seu preço de vend—F
pigur— IX qrá(™o de dispersão p—r— —s v—riáveis es™olhid—s
y grá(™o —o l—do serve de refeên™i— n—quilo que seri— — —nálise de tendên™i—s p—r— — disE
tri˜uição dos d—dos e o ™omport—mento @—sso™i—ção dos d—dosAF É de o˜serv—r — —sso™i—ão
™l—r— entre o preço de vend— e —s dem—is v—riáveisD no ent—nto mesm— —nálise não se pode
f—zer —o preço vsF numeros de qu—rtosD isto é — disposição dos d—dos rel—tivos — ess— v—riável
não é de f—™il —nálise gr—(™—F
11. UEM-DMI Trabalho prático I - Econometria II
pri™e rooms ™˜d —ge
pri™e IFHHHH
rooms HFRRQI IFHHHH
HFHHHH
™˜d HFPPHT HFQHRI IFHHHH
HFHHHI HFHHHH
—ge EHFQQIW EHFHSIP EHFQWHQ IFHHHH
HFHHHH HFQTHT HFHHHH
„—˜el— TX gorrel—ções e su— signi(™ân™i—
€elos result—dos em „—˜el— TD not—Ese — um nível de signi(™ân™i— de α = 0.05D —s
v—riáveis es™olhid—s são ™orrel—™ion—d—s ™om o preço de vend— d— ™—s—D poisD os v—lores dos
seus sig9s são menores qu—ndo ™omp—r—dos ™om αF
xum˜er of o˜s QPI
p@ QD QIUA RQFVV
€ro˜ b p HFHHHH
‚Esqu—red HFPWQR
edj ‚Esqu—red HFPVTV
‚oot wƒi QTSHR
ys result—dos mostr—m que — um nível signi(™ân™i— de S7D que os ™oe(™ientes
pri™e goefF ƒtdF irrF t €bt ‘WS7 gonfF snterv—l“
—ge ERQIFPSUW TVFPTISW ETFQP HFHHH ESTSFSTHW EPWTFWSRW
™˜d EFIWHTQQR FPSWVVVS EHFUQ HFRTR EFUHIWSUU FQPHTWHV
rooms PIHQIFVV PQVQFWW VFVP HFHHH ITQRIFRR PSUPPFQP
•™ons EQITPSFQV ISIUIFUQ EPFHV HFHQV ETIRUSFR EIUUSFQUI
„—˜el— UX wodelo de regressão estim—do
dos modelo são est—tisti™—mente signi(™—tivosD ex™epto p—r— — v—riável 4™˜d4™omo er— de
esper—r — v—riável 4—ge4—present— um ™oe(™iente de el—sti™id—de neg—tivo semelh—nte —o
sin—l d— su— ™orrel—ção ™om — v—ri—ável em estudoD mesmo espe™t—tiv— tinh—Ese so˜re o
12. UEM-DMI Trabalho prático I - Econometria IP
™oe(™iente de el—sti™id—de d— v—riável 4™˜d4D no ent—nto esse result—do em˜or— neg—tivo o
mesmo ™ontr—diz —o que t—nge —o sin—l de seu ™oe(™iente de ™orrel—çãoF
y modelo em —nálise expli™— PVFT7 d—quilo é o preço de vend— d—s ™—s—sD o mesmo
poder sustent—do ™om v—lor d— est—tísti™— pD que — um nível de signi(™ân™i— de S7 v—lores
est—tísti™—mente signi(™—tivosF
13. UEM-DMI Trabalho prático I - Econometria IQ
3 Códigos em STATA
sum pri™e
t—˜le ye—r
t—˜le ye—r pri™e
˜y ye—rD sort X summ—rize pri™e
ttest pri™eD ˜y@ye—rA unequ—l
ttest pri™eD ˜y@ye—rA
regress pri™e rooms —ge ™˜d
gr—ph m—trix —ge ™˜d pri™e rooms