sampling

Question 1

Sample

Answer 1

a group of people who take part in a research investigation, to represent the target population

Question 2

random sample

Answer 2

every person in the target population stands an equal chance of being selected

Question 3

opportunity sample

Answer 3

involves the researcher using anyone who available at the time and willing to take part

Question 4

stratified sample

Answer 4

randomly selecting participants from each sub-group in the target population so that each sub-group is represented proportionally

Question 5

systematic sample

Answer 5

where every nth member of the target population is chosen

Question 6

volunteer sample

Answer 6

involves participants selecting themselves

Question 7

strengths of random sample

Answer 7

-representative
-can be generalised

Question 8

weaknesses of random sample

Answer 8

-costly and time consuming
-not the most convenient

Question 9

strengths of opportunity sample

Answer 9

-quick and easy
-cheap
-most convenient

Question 10

strengths of stratified sampling

Answer 10

-very representative
-can be generalised

Question 11

weaknesses of stratified sampling

Answer 11

-costly
-time consuming

Question 12

strengths of systematic sampling

Answer 12

-eliminates researcher bias
-should be representative

Question 13

limits of systematic sampling

Answer 13

-isn’t always representative
-can’t always be generalised as a result

Question 14

strengths of volunteer sample

Answer 14

-quick
-easy

Question 15

weaknesses of volunteer sampling

Answer 15

-isn’t likely to be representative due to volunteer bias
-can’t be generalised