The total population of teachers in a school system consists of 25 percent elementary, 30 percent middle school, and 45 percent secondary.A researcher selects a random sample of 60 teachers, made up of 15 elementary, 18 middle school, and 27 high school teachers.This is an example of
A) simple random sampling.
B) stratified sampling.
C) cluster sampling.
D) quota sampling.

Question

Quizplus · Accepted Answer

This is an example of stratified sampling as the population of teachers is divided into three strata based on their level of teaching and a sample is taken from each stratum proportional to its size.

The Total Population of Teachers in a School System Consists