The Dean of Students mailed a survey to a total of 400 students.The sample included 100 students randomly selected from each of the freshman,sophomore,junior,and senior classes on campus last term.What sampling method was used?
A)Simple random sample
B)Systematic sample
C)Stratified sample
D)Cluster sample

Question

Quizplus · Accepted Answer

A stratified sample was used because the population (students) was divided into four strata (freshman, sophomore, junior, senior) and a random sample of 100 students was selected from each stratum.

The Dean of Students Mailed a Survey to a Total