Sampling methods: Survey

Sampling methods: Survey

1. Non-experimental method

2. Important points: Questions and who are the people that answers it

3. To get specific information

4. It's important to add the option "other" to have more trustable answers

5. The questions must be in a neutral point of view, so the people will answer honestly

6. Simple random sampling is the best way to have an optinion from all the popultation, not only a group of people.

7. Non-response Bias

   • People who are most likely to complete a survey are systematically different from those who don't

8. Voluntary Response Bias

   • The people who choose to respond, are different from other groups

9. Underrepresentation

   • If a group of interest is a minority and the Random Sampling won't represent them

10. Stratified Random Sampling

    • Splits the population into groups of interest and randomly selects people

11. Cluster Sampling

    • Create clusters that are naturally occuring, and randomly selects clusters to survey, no individuals

12. Snowball sampling

    • Current respondents are asked to help recruit people they know from the population of interest

13. Cencus

    • survey to the entire population
    • Minimize the sampling error
    • Specific information
    • Be cautious
      • Badly Worded Polls
      • Fake Polls
      • Biased Polls
      • To prevent
        • Seems professional?
        • Check the questions
        • Who and how?