Cluster sampling is useful when sampling units are__________?
Correct answer: B. Far a part
- A. Close another
- B. Far a part
- C. Mixed
- D. None of these
Explanation
Cluster sampling is useful when individual units are geographically far apart, because selecting whole clusters reduces travel and fieldwork costs. The wording means the units are spread over a wide area.
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Practise Sampling and Sampling Distributions
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