State one advantage and one disadvantage of random sampling.
Advantage- gives the best chance of an unbiased and representative sample
Disadvantage- impractical for a larger target population
1 of 11
Define the term 'representative' in terms of a sample
A sample that is typical of the target population that means we can generalise our findings.
2 of 11
State one advantage and one disadvantage of opportunity samples.
advantages- quick, easy, cost-effective
disadvantage- sample may be unrepresentative or biased
3 of 11
Why is an opportunity sample likely to be biased?
- likely to choose participants who 'look' helpful or friendly
- very small segment of the target population
4 of 11
Define sampling bias.
Sampling bias is where a particular group is over-represented in a study.
5 of 11
What is stratified sampling?
Target population is divided into important strata or sub-categories.
Participants are then selected from each category proportionally.
6 of 11
Suggest an example of when a researcher would use stratified sampling.
Investigating attitudes toward abortion- may want to ensure that there is equal representation of different religious groups.
7 of 11
Suggest a disadvantage of stratified samples.
Sampling bias may occur when the researcher is identifying the relevant sub-categories.
8 of 11
Give an example of how volunteer samples are collected.
-ads in the local newspaper
-a television ad
-targeted ads in specific media outlets
9 of 11
Outline two advantages of volunteer sampling.
-Most ethical method of sampling as volunteers consciously decide to participate
-Participants are likely to be co-operative
10 of 11
Suggest a disadvantage of volunteer sampling.
choose one from:
-Sampling bias may occur as volunteer attitudes are likely to differ from non-volunteers
-Not everyone in the target population may have access to the ad
11 of 11
Other cards in this set
Card 2
Front
Define the term 'representative' in terms of a sample
Back
A sample that is typical of the target population that means we can generalise our findings.
Card 3
Front
State one advantage and one disadvantage of opportunity samples.
Comments
No comments have yet been made