When subgroups of a population are represented in a sample in proportion to their numbers in the population, the sample is known as a

Question

Quizplus · Accepted Answer

A stratified random sample ensures that subgroups of a population are represented in proportion to their numbers in the population, which meets the criteria described in the question. Random sampling (A) is not sufficient to ensure proportional representation of subgroups, as chance alone may not result in the correct representation. Systematic area sampling (C) involves dividing a population into smaller areas and sampling them systematically, but does not necessarily ensure proportional representation of subgroups. Proportional sampling (D) is not a commonly used term in survey research, and may not accurately describe the method described in the question.

When Subgroups of a Population Are Represented in a Sample