If a researcher for Procter & Gamble selects five states randomly, and then selects 10 supermarket chains within each of these states to call for a phone survey for research regarding a new shampoo, what type of sampling procedure is being used?
A) systematic sample
B) simple random sample
C) nonprobability sample
D) cluster sample

Question

Quizplus · Accepted Answer

This is a cluster sample, as the population is divided into clusters (the five states) and a sample is taken from each cluster (10 supermarket chains in each state).

If a Researcher for Procter & Gamble Selects Five States