The sum of the differences of a set of scores about the mean of those scores is always.
A)greater than the mean itself
B)equal to the mean
C)equal to 1.0
D)equal to zero

Question

Quizplus · Accepted Answer

This is a property of the mean. The sum of the differences about the mean is always zero because some scores will be above the mean and some will be below it, so their differences will cancel each other out.

The Sum of the Differences of a Set of Scores