From its 32 regions, the FAA selects 6 regions, and then randomly audits 25 departing commercial flights in each region for compliance with legal fuel and weight requirements. This is an example of:
A)simple random sampling.
B)stratified random sampling.
C)cluster sampling.
D)judgment sampling.

Question

Quizplus · Accepted Answer

This is an example of cluster sampling because the FAA selects entire regions (clusters) and then audits all flights within those selected regions.

From Its 32 Regions, the FAA Selects 6 Regions, and Then