The 2009 National Survey on Drug Use and Health selected a random sample of U.S.college students and asked them about illicit drug use.Roughly 23% of the students surveyed reported using illicit drugs in the past year.The variable in this study is:
A) the percentage of students who reported using illicit drugs.
B) whether or not a student used illicit drugs.
C) whether or not a college student responded to the survey.
D) the number of college students who use illicit drugs.

Question

Quizplus · Accepted Answer

The variable in this study is whether or not a student used illicit drugs. This is because the survey asked students if they had used illicit drugs in the past year, making drug use a binary variable (yes or no). The other options listed are not variables in this study; they are either measures or components of the study.

The 2009 National Survey on Drug Use and Health Selected