The personnel manager of a corporation wants to estimate, for one year, the total number of days used for sick leave among all 116 plants in his firm. The 116 plants are divided into 30 "small" plants, 45 "medium" plants, and 41 "large" plants. He decides to randomly select 40 employees from each of the three size of plants. What kind of sampling does this illustrate?
A)Systematic
B)Stratified
C)Cluster
D)Random sampling

Question

Quizplus · Accepted Answer

This is an example of stratified sampling because the personnel manager divides the plants into different strata (small, medium, and large) and then randomly selects a sample from each stratum.

The Personnel Manager of a Corporation Wants to Estimate, for One