Your instructor notices that in many of his classes, the longer he lectures, the more student yawns he sees. This represents:
A) a positive correlation.
B) a negative correlation.
C) a cause-and-effect relationship.
D) scientific proof that yawning is contagious.

Question

Quizplus · Accepted Answer

A positive correlation occurs when two variables move in the same direction, such as longer lectures being associated with more yawns.

Your Instructor Notices That in Many of His Classes, the Longer