The sum of the differences between the scores of a distribution and the mean of the scores is always________.
A) 0.
B) 1.
C) the same as the number of cases.
D) None of the answer choices.

Question

Quizplus · Accepted Answer

By definition, the sum of the deviations from the mean always equals zero. This is because some scores will be above the mean and some below, and the positive deviations cancel out the negative deviations. Thus, the sum of the differences must always be zero.

The Sum of the Differences Between the Scores of a Distribution