Other Sampling Methods

Question 2 • VA-Probability and Statistics

Which of the following statements is true about cluster sampling?

Answer

Once clusters are selected, participants are randomly selected from those clusters.

Cluster selection does not have to be random, as long as each chosen cluster is randomly sampled.

Cluster sampling uses clusters, which are homogenous groups in regard to characteristics being studied.

Participants within clusters usually live within close proximity, which saves time and money for data collection.

Explanation

Cluster sampling selects naturally occurring groups, often based on location, and collects data from people in the selected clusters. Because people in a cluster are close together, researchers can save time and money on data collection. Clusters do not need to be homogeneous in the characteristic being studied, so C is not true; A describes a possible two-stage procedure, not cluster sampling in general.

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