_______ is used when different strata are apparent in the population and each stratum is randomly sampled.

_______ is used when different strata are apparent in the population and each stratum is randomly sampled.

_______ is used when different strata are apparent in the population and each stratum is randomly sampled.


A) Systematic sampling
B) Stratified sampling
C) Cluster sampling
D) Simple random sampling

Answer: b. Stratified sampling


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