Sampling,

1. Sampling Terminology

2. Two Major Types of Sampling
Methods
Uses some form of random
selection.
Requires that each unit have
a known (often equal)
probability of being
selected.
Selection is systematic or
haphazard, but not
random.
Probability sampling
Nonprobability
sampling

3. Who do you want
to generalize to?
Groups in Sampling

4. Groups in Sampling
The theoretical
population

5. What population can
you get access to?
Groups in Sampling
The theoretical
population

6. Groups in Sampling
The Theoretical
Population
The study
population

7. How can you get
access to them?
Groups in Sampling
The theoretical
population
The study
population

8. Groups in Sampling
The theoretical
population
The study
population
The sampling
frame

9. Who is in your study?
Groups in Sampling
The theoretical
population
The study
population
The sampling
frame

10. Groups in Sampling
The theoretical
population
The study
population
The sampling
frame
The sample

11. Where Can We Go Wrong?
The theoretical
population
The study
population
The sampling
frame
The sample

12. Where Can We Go Wrong?
The theoretical
population
The study
population
The sampling
frame
The sample

13. Where Can We Go Wrong?
The theoretical
population
The study
population
The sampling
frame
The sample

14. Where Can We Go Wrong?
The theoretical
population
The study
population
The sampling
frame
The sample