Sampling technique

Question 1

Opportunity sampling

Answer 1

When the researcher uses people available at the time of research.

Question 2

Strengths of opportunity sampling

Answer 2

Quick and easy

Convenient for researcher

Question 3

Weaknesses of opportunity sampling

Answer 3

Can produce a biased sample

Question 4

Random sampling

Answer 4

When everyone in the target population has the same chance of being selected.

Question 5

Strengths of random sampling

Answer 5

No bias in the way people are selected, therefore the sample is more likely to be representative.

Question 6

Weaknesses of random sampling

Answer 6

Time-consuming

Not always possible

Question 7

Volunteer sampling

Answer 7

When participants select themselves and are selected for sampling. Some sort of advertising is used.

Question 8

Strengths of volunteer sampling

Answer 8

Can reach a wide range of people in a cost effective way

Question 9

Weaknesses of volunteer sampling

Answer 9

Volunteers are often more motivated and willing which may affect their performance.

Question 10

Stratified sampling

Answer 10

When the proportions of the sample match the proportions of the target population.

Question 11

Strengths of stratified sampling

Answer 11

Produces a representative sample of the target population

Question 12

Weaknesses of stratified sampling

Answer 12

Time-consuming