A stratified random sample reduces error when
A) an equal number of cases is drawn from each stratum.
B) the stratifying variable is related to the variable under study.
C) the differences between strata are relatively small.
D) the number of cases in each stratum of the sample is proportionate to the number of cases in the population.

Question

Quizplus · Accepted Answer

Stratified random sampling reduces error when the stratifying variable is related to the variable under study because it ensures that the sample accurately reflects the diversity of the population with respect to the variable of interest.

A Stratified Random Sample Reduces Error When