A researcher studying sleep deprivation finds that as the amount of sleep decreases, there is a proportional decrease in one's immune system. This illustrates a __________ correlation.
A)positive
B)negative
C)zero
D)dependent

Question

Quizplus · Accepted Answer

A positive correlation is indicated when two variables move in the same direction, meaning as one variable decreases, the other also decreases or as one increases, the other also increases. In this case, as sleep decreases, immune system functionality also decreases, illustrating a positive correlation.

A Researcher Studying Sleep Deprivation Finds That as the Amount