Chapter 6 Research Methods - Sampling

Question 1

Random sample?

Answer 1

Equal chance of selection, lottery.

Question 2

Systematic sample?

Answer 2

Selecting every nth person from a list.

Question 3

Stratified sample?

Answer 3

Sample reflects the proportion of people in different population strata.

Question 4

Opportunity sample?

Answer 4

Choosing whoever is available.

Question 5

Volunteer sample?

Answer 5

Pts ‘self select’ e.g. advert.

Question 6

Evaluation of random sampling?

Answer 6

S - Potentially unbiased, control confounding & extraneous variables.
L - Time-consuming, pts may refuse.

Question 7

Evaluation of systematic sampling?

Answer 7

S - Objective method.
L - Time-consuming, pts may refuse causing volunteer sample.

Question 8

Evaluation of stratified sampling?

Answer 8

S - Representative.
L - Can’t account for everyone in subgroup.

Question 9

Evaluation of opportunity sampling?

Answer 9

S - Conventient.
L - Unrepresentative.

Question 10

Evaluation of volunteer sampling?

Answer 10

S - Easy & pts engaged.
L - Volunteer bias, attract certain ‘profile’.