Chapter 09

Estimation and Confidence Intervals Chapter 9

GOALS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Point and Interval Estimates ,[object Object],[object Object]

Factors Affecting Confidence Interval Estimates ,[object Object],[object Object],[object Object],[object Object]

Interval Estimates - Interpretation ,[object Object]

Characteristics of the t-distribution ,[object Object],[object Object],[object Object],[object Object]

Comparing the z and t Distributions when n is small

Confidence Interval Estimates for the Mean ,[object Object],[object Object],[object Object],[object Object]

When to Use the z or t Distribution for Confidence Interval Computation

Confidence Interval for the Mean – Example using the t-distribution ,[object Object]

Student’s t-distribution Table

[object Object],Confidence Interval Estimates for the Mean – Using Minitab

Confidence Interval Estimates for the Mean – By Formula

Confidence Interval Estimates for the Mean – Using Minitab

Confidence Interval Estimates for the Mean – Using Excel

Using the Normal Distribution to Approximate the Binomial Distribution ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Confidence Interval for a Population Proportion ,[object Object]

Confidence Interval for a Population Proportion - Example ,[object Object],[object Object]

Finite-Population Correction Factor ,[object Object],[object Object],[object Object]

Effects on FPC when n/N Changes Observe that FPC approaches 1 when n/N becomes smaller

Confidence Interval Formulas for Estimating Means and Proportions with Finite Population Correction C.I. for the Mean (  ) C.I. for the Proportion (  ) C.I. for the Mean (  )

CI For Mean with FPC - Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CI For Mean with FPC - Example

Selecting a Sample Size ,[object Object],[object Object],[object Object],[object Object]

Sample Size Determination for a Variable ,[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Sample Size Determination for a Variable-Example

[object Object],Sample Size Determination for a Variable- Another Example

Sample Size for Proportions ,[object Object]

Another Example ,[object Object]

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Chapter 09