If a stratified random sample is to be conducted which of


If a stratified random sample is to be conducted, which of the following is true?

A. The population will be broken down into subgroups called strata.
B. Each subgroup should contain items that are homogeneous with respect to the characteristics of interest.
C. All of these.
D. If effective, the total required sample size should be less than that which would be needed if a simple random sample were selected.

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