The difference between z scores and standard scores is that
A) z scores can never be negative, whereas standard deviation scores always are
B) z scores can only be calculated with reference to the mean, whereas standard scores relate to the median
C) z scores can only be calculated with reference to the standard deviation, whereas standard scores relate to the variance
D) none of these, since z scores are standard scores

Question

Quizplus · Accepted Answer

The statement "z scores are standard scores" is correct. Both terms refer to scores that have been standardized by transforming them into a common scale with a mean of 0 and a standard deviation of 1. Therefore, there is no difference between z scores and standard scores, and choice D is the correct answer. Choices A, B, and C are all incorrect statements about z scores and/or standard scores.

The Difference Between Z Scores and Standard Scores Is That