Research Methods, Sampling Methods Flashcards
1
Q
what are the two types of sampling?
A
- random - everyone has equal chance of being selected
- non-random - not everyone has equal chance of being selected
2
Q
what are the 10 sampling methods?
A
- simple random
- systematic random
- stratified random
- opportunity
- volunteer
- snowball
- purposive
- cluster
- census
- multi-stage
3
Q
what is simple random sampling?
A
-completely random
- names in a hat/name generator
4
Q
what are the strengths of simple random sampling?
A
- quick
- simple
- time-saving
5
Q
what are the weaknesses of simple random sampling?
A
- risk of population bias which leads to unrepresentative, ungeneralisable data
6
Q
what is systematic random sampling?
A
- uses a sampling frame (list of names of target population which organise them into key indicators like age, IQ, gender)
- use nth term
7
Q
what are the strengths of systematic random sampling?
A
- representative
- counteracts population bias, representative & generalisable
8
Q
what are the weaknesses of systematic random sampling?
A
- requires sampling frame, can be difficult to obtain
- takes a long time
9
Q
what is opportunity sampling?
A
- selecting whoever is available at given time or location
10
Q
what are the strengths of opportunity sampling?
A
- simple, does not require sampling frame, saves time
11
Q
what are the weaknesses of opportunity sampling?
A
- population bias, limited demographic, unrepresentative and ungeneralisable
