Quota sampling
A quota can ensure that selected groups appear in the sample, but convenience selection within groups may introduce bias and does not generally support the same probability-based inference as random sampling. Define quotas and recruitment methods and assess their effect on the decision.
Worked example
An interviewer seeks 30 responses from each of three customer age bands, choosing convenient respondents until each quota is filled. This is quota sampling rather than necessarily random sampling.
Common mistake
Assuming category quotas make every participant equally likely to be selected or remove all selection bias.
Where it appears in your exams
| Qualification | Exam | Relationship | Period |
|---|---|---|---|
| ACCA | MA | Direct | September 2026–June 2027 |
| FIA | FMA | Direct | September 2026–June 2027 |