A researcher discovers that if people eat a certain fruit before a test, the more fruit eaten, the better they do on the test. Beyond a certain point, however, the more fruit eaten the worse people do on the test. The relation between amount of fruit eaten and how well people do on the test is an example of:
A)a positive linear correlation
B)a curvilinear correlation
C)a negative linear correlation
D)no correlation

Question

Quizplus · Accepted Answer

A curvilinear correlation is one in which the relationship between the two variables is curved, rather than a straight line. In this situation, as more fruit is consumed, performance on the test initially improves, but eventually reaches a peak and then declines as more fruit is consumed. This is a clear example of a curvilinear correlation.

A Researcher Discovers That If People Eat a Certain Fruit