Sampling (D) Flashcards
1
Q
Explain volunteer sampling
A
when ppts volunteer through an advert
2
Q
Explain Opportunity sampling
A
when researcher approaches the public for ppts
3
Q
Explain Systematic sampling
A
selecting every nth person from a list of population
4
Q
Explain Random Sampling
A
Random selection from the population
5
Q
Explain Stratified sampling
A
Where each subgroup has the same ratios of people as the population
Eg 600/1000 muslims = 6/10 muslims in study
6
Q
Evaluate volunteer and opportunity samplings
A
- Easier to do
- Less representative (only willing people will volunteer only certain groups will be available on the day)
7
Q
Evaluate systematic samplings
A
- more representative
- more difficult (requires a list of everyone)
- data may not be representative if list is in a pattern
8
Q
Evaluate random sampling
A
- very representative
- difficult (need a randomiser and a list of population)
- will not reflect the proportions of groups in the population so may not be representative
9
Q
Evaluate stratified sampling
A
- high population validity
- researchers may miss out a subgroup
- difficult and time consuming
10
Q
How is a population different from a sample?
A
population is the group you intend to draw research from
sample is the specific group you collect data from
