Janice wishes to ensure that she has equal numbers of freshmen, sophomores, juniors, and seniors in her sample. She separates the population into subpopulations according to class rank and draws random samples from each subpopulation. Janice has engaged in ___________ sampling.
A) convenience
B) replacement
C) stratified random
D) non-random

Question

Quizplus · Accepted Answer

Janice is using stratified random sampling because she divides the population into subpopulations (strata) based on class rank and then takes random samples from each stratum to ensure equal representation.

Janice Wishes to Ensure That She Has Equal Numbers of Freshmen