A pollster wants to ask a sample of undergraduates at State Tech how they feel about a proposal to build a new dorm in the place of the school's largest commuter parking lot. Opinions may differ depending on whether the student is a commuter or resident, so the pollster takes separate SRSs of commuters and resident students and combines them to form his sample. He used a:
A) simple random sampling.
B) cluster sampling.
C) stratified random sampling.
D) sampling in stages.

Question

Quizplus · Accepted Answer

The pollster used stratified random sampling by dividing the population into two strata - commuters and residents - and taking separate SRSs from each stratum. This ensures that both groups are represented in the sample and that the sample is more representative of the population as a whole.

A Pollster Wants to Ask a Sample of Undergraduates at State