A statewide sample survey is to be made. First, the state is subdivided into counties. Seven counties are selected at random and further sampling is concentrated on these seven counties. What type of sampling is this?
A) Simple random
B) Systematic random sampling
C) Cluster
D) Stratified

Question

Quizplus · Accepted Answer

This is cluster sampling, as the state is divided into counties and a random selection of seven counties is made. Then, further sampling is conducted within these selected counties.

A Statewide Sample Survey Is to Be Made