Scientists have found that, on average, as a person's weight increases, her or his activity level decreases. This is an example of ______.
A) placebo effect
B) a positive correlation
C) a selection factor
D) a negative correlation

Question

Quizplus · Accepted Answer

This is because a negative correlation indicates an inverse relationship between two variables - as one variable increases, the other decreases. In this case, weight and activity level have a negative correlation, meaning as weight increases, activity level tends to decrease.

Scientists Have Found That, on Average, as a Person's Weight