A sample of college age students shows an interesting association between hair length (in inches) and height (also in inches). On average, shorter students tend to have longer hair. What is a possible confounding variable that would help explain this relationship?
A) Gender
B) Age
C) Grade point average
D) Local fashion preferences

Question

Quizplus · Accepted Answer

Gender is a possible confounding variable. We are looking at students in general, which can be either male or female. Females tend to be shorter than males, and females tend to have longer hair than males.

A Sample of College Age Students Shows an Interesting Association