A random sample of five elementary schools is surveyed by sending trained people to interview the teachers in these schools.This is an example of
A) simple random sampling.
B) stratified sampling.
C) cluster sampling.
D) quota sampling.

Question

Quizplus · Accepted Answer

This survey method is an example of cluster sampling because the population of interest (elementary schools) is divided into clusters (individual schools) and a random sample of clusters is chosen (five schools). The researchers then collect data from all the individuals within the chosen clusters (the teachers).

A Random Sample of Five Elementary Schools Is Surveyed by Sending