A pharmaceutical company interested in measuring how often physicians prescribe a certain drug has selected a simple random sample from each of two groups: M.D.(medical doctors)and D.O (osteopathic doctors).What is this type of sampling called?
A) Simple random sampling
B) Cluster sampling
C) Stratified sampling
D) Purposive sampling
E) Quota sampling

Question

Quizplus · Accepted Answer

This type of sampling is called stratified sampling because the population (physicians) is divided into two strata (M.D. and D.O) and a simple random sample is selected from each stratum. This ensures that both types of physicians are represented in the sample and may provide more precise estimates for each subgroup.

A Pharmaceutical Company Interested in Measuring How Often Physicians Prescribe