On Normally Distributed Curves, Which of the Following Is NOT

Multiple Choice

On normally distributed curves, which of the following is NOT true?

A) The percentile rank mean is always p = 50.
B) The mean of z scores is always 0.
C) The mean of the standard deviation is 0.
D) The mean of standard scores vary as a function of the type of standard score .
E) The mean of the publisher type score varies as a function of the publisher.