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Stratified random sampling is a method of selecting a sample in which: A. the sample is first divided into strata, and then random samples are

Stratified random sampling is a method of selecting a sample in which:

A. the sample is first divided into strata, and then random samples are taken from each stratum.

B. various strata are selected from the sample.

C. the population is first divided into strata, and then random samples are drawn from each stratum.

D. None of these alternatives is correct.

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