If the original raw score distribution has a mean that is not equal to zero, the mean of the z transformed scores will not equal zero either.

Question

Quizplus · Accepted Answer

The mean of the z transformed scores will always equal zero, regardless of the original mean, because z scores are standardized scores that represent the number of standard deviations a score is from the mean, effectively centering the distribution around zero.

If the Original Raw Score Distribution Has a Mean That