1. Research methods

2. Internal data
I t ld t
Secondary source -> Secondary data External data
Data source
Primary source
i -> Primary data
i d

3. Observation
Data Experiment
p
collection Survey

4. Random sampling
Probability Systematic sampling
sampling
Stratified sampling
Sampling
Convenience sampling
Non probability
Non-probability
sampling Judgmental sampling
Quota sampling

5. -By post
-Telephone
Approach
A h -Personal inter ie
Personal interview
Survey
- Unstructured
d
methods Questionnaire - Structured
- In-house
- Agency(Outsourced)
Administration

6. Ad hoc
Survey
frequency
Continuous