Unless there is a perfect relationship between X and Y,then predictions for Y will?
A)Be invalid.
B)Be closer to the mean of X.
C)Be closer to the mean of Y.
D)Fall on a straight line.

Question

Quizplus · Accepted Answer

Predictions for Y, when there isn't a perfect relationship between X and Y, tend to regress towards the mean of Y. This phenomenon is known as regression toward the mean. It means that if X and Y are less than perfectly correlated, the predicted values of Y for given values of X will be closer to the mean of Y than to the extreme values of Y observed for those values of X.

Unless There Is a Perfect Relationship Between X and Y,then