When a population is heterogeneous it is divided into groups so...

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When a population is heterogeneous, it is divided into groups, so that there is homogeneity within the group and heterogeneity between the groups, and some items are selected at random from each group. It is a case of:

A. Cluster Random Sampling

B. Systematic Random Sampling

C. Quota Sampling

D. Stratified Random Sampling

Answer: Option D

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