A professor believes that students who smoke cigarettes tend to have lower grades. He collects data from 1326 randomly selected students at his university and discovers that, on average, students who smoke cigarettes do indeed tend to have lower grade point averages than students who do not smoke.
This study was based on

Question

Quizplus · Accepted Answer

The study used a probability sample because it involved selecting students randomly from the university population, which allows for generalization of the findings to the entire student body.

A Professor Believes That Students Who Smoke Cigarettes Tend to Have