Sampling Flashcards
1
Q
Define target population
A
A specific group of people the research is often intrested in
2
Q
What are the types of sampling techniques?
A
- Random
- Opportunity
- Stratified
- Volunteer
- Systematic
3
Q
What is random sampling?
A
Each member of the target population has an equal chance of being selected.
4
Q
Give some examples of random sampling techniques
A
- lottery method
- random number generator
5
Q
Strength of random sampling?
A
- Avoids researcher bias as researcher can’t choose ppts
6
Q
Limitations of random sampling?
A
- can be unrepresentative by chance
- time consuming to get a full list of target population
7
Q
What is systematic sampling?
A
- need population list
- pick every nth person
8
Q
Strength of systematic sampling?
A
- avoids researcher bias
- if there is existing list of target population then it can be a quick method of selecting a sample
9
Q
Weakness of systematic sampling?
A
- by chance could be unrepresentative
- if target population is very large getting list could be difficult
- not truly random unless you select a number at random to begin with
10
Q
What is opportunity sampling?
A
Choses people who are the most convenient or most avaliable
11
Q
Strength of opportunity sample?
A
- easy and cheap
- fast
12
Q
Weakness of opportunity sample?
A
- researcher bias as they choose
- limited sample
13
Q
What is volunteer sample?
A
Self-selected sample. Advertisements are placed in newspapers or internet
14
Q
Strength of volunteer sampling?
A
- Easy
- gives access to wide variety of ppts
15
Q
Weakness of volunteer sampling?
A
- overly keen ppts = DC, socially desirable answers
- not be generalisable to target population
- more motivated causing sample bias
