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To choose a cluster sample you divide the population into clusters and then:
APick the nearest cluster
BRandomly select some clusters
CTake a few from each cluster
DTake every nth cluster member
Answer & Solution
Correct answer: B. Randomly select some clusters
1. Cluster sampling saves effort by sampling whole groups.
2. To choose a cluster sample, divide the population into clusters, that is groups.
3. Then randomly select some of the clusters.
4. All members of the selected clusters make up the sample.
_Source: OpenStax Introductory Statistics 2e (CC BY 4.0), Ch 1 'Sampling and Data', sections 1.1-1.4_
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