Sampling

Question 1

How is stratified sampling selected?

Answer 1

Subgroups identified and selected in proportion to their occurrence in the population

Question 2

What are two strengths of stratified sampling?

Answer 2

-The sample is representative of the target population
-Selection is unbiased as it is based on the sub groups in the population

Question 3

What are two limitations of stratified sampling?

Answer 3

-Time consumer
-Researcher requires knowledge of the subgroups

Question 4

What are two limitations of volunteer sampling?

Answer 4

-Volunteer bias, these people are often a ‘certain’ type of person
-Volunteers are eager to please so they may display demand characteristics

Question 5

What is systematic sampling?

Answer 5

Selecting every nth person from a list to make a sample

Question 6

What are two strengths of systematic sampling?

Answer 6

-Unbiased selection
-Representative sample, able to be generalised

Question 7

What are two limitations of systematic sampling?

Answer 7

-Every nth person may have a shared characteristic