The correlation coefficient between the hours that a person is awake during a 24-hour period and The hours that same person is asleep during a 24-hour period is most likely to be
A) exactly $- 1.0$
B) near 0
C) near $- 0.8$
D) exactly $+ 1.0$
E) near $+ 0.8$

Question

The correlation coefficient between the hours that a person is awake during a 24-hour period and The hours that same person is asleep during a 24-hour period is most likely to be 
A) exactly $- 1.0$
B) near 0
C) near $- 0.8$
D) exactly $+ 1.0$
E) near $+ 0.8$

Quizplus · Accepted Answer

The correlation coefficient is likely to be exactly -1.0 because the hours awake and hours asleep are perfectly negatively correlated; as one increases, the other decreases by the same amount in a 24-hour period.

The Correlation Coefficient Between the Hours That a Person Is −1.0- 1.0−1.0

The Correlation Coefficient Between the Hours That a Person Is $- 1.0$