18. MULTI-STAGE SAMPLING

Question 1

1. What does Multi-Stage sampling utilise?

Answer 1

• it utilises the hierarchical structure of the natural
  clusters and groups
• these clusters are made up of individuals within the
  population

Question 2

2. What happens after we randomly select the Clusters?

Answer 2

• we proceed to randomly select individuals within the
  clusters

Question 3

3. What is involved in the Multi-Stage sampling procedure?

Answer 3

• several Random Sampling Stages

Question 4

4. List the Random Sampling Stages.

Answer 4

STAGE ONE:
- this is the random selection of large clusters
- EG: schools

STAGE TWO:
- this is the random selection of smaller clusters within
the larger clusters
- EG: class

STAGE THREE:
- this is the random selection of individuals within
smaller clusters

Question 5

5. What are the 2 advantages of Multi-Stage sampling?

Answer 5

1. IT MAY IMPROVE THE SAMPLE REPRESENTATIVENESS
   - much more than Simple Random Sampling
   - especially if the population is geographically diverse
   - or if the sample is too small
2. IT IS LESS COSTLY
   - it is less time consuming
   - this depends on the number of stages

Question 6

6. What is the one disadvantage of Multi-Stage Sampling?

Answer 6

1. THE REPRESENTATIVENESS OF THE SAMPLE MAY BE
   COMPROMISED:
   - if too few clusters are selected
   - if the clusters are too specific
   - if the clusters contain too few individuals

Question 7

7. What kind of sampling does this image represent?

Answer 7

• Simple Random Sampling

Question 8

8. What kind of sampling does this image represent?

Answer 8

• Systematic Sampling

Question 9

9. What kind of sampling does this image represent?

Answer 9

• Stratified Sampling

Question 10

10. What kind of sampling does this image represent?

Answer 10

• Cluster Sampling