You wish to describe the relationship between exam grades and the amount of time students watch the Discovery Channel. The correlation turns out to be r = +0.30. What does this mean?
A) The more a student watches the Discovery Channel, the higher his or her exam grades tend to be.
B) The more a student watches the Discovery Channel, the lower his or her exam grades tend to be.
C) In order to increase your exam grades, it is recommended that you spend more time watching the Discovery Channel.
D) 30% of the variation in exam grades is explained by the linear relationship with time spent watching the Discovery Channel.

Question

Quizplus · Accepted Answer

A positive correlation (r = +0.30) indicates that there is a positive relationship between the two variables, meaning as one variable increases, the other tends to increase as well. In this case, it suggests that the more a student watches the Discovery Channel, the higher their exam grades tend to be.

You Wish to Describe the Relationship Between Exam Grades and the Amount