A pollster randomly samples 136 Democrats, 163 Republicans and 17 Independents (all registered voters) in Metro City and asks each poll participant which mayorial candidate
He or she prefers. Identify the kind of sample that the pollster is using.
A) voluntary response sample
B) stratified sample
C) cluster sample
D) sample of convenience

Question

Quizplus · Accepted Answer

The pollster is using a stratified sample because the population is divided into subgroups (Democrats, Republicans, and Independents) and random samples are taken from each subgroup.

A Pollster Randomly Samples 136 Democrats, 163 Republicans and 17