10. A normal distribution has a mean of =60 and a standard deviation of =12. For each of the samples, compute the z-score for the sample mean, and determine whether the sample mean is typical, representative value or an extreme value for a sample of this size.

A. M=64 for n=4 scores:

z=which is an extreme or a typical value.

B. M=64 for n=9 scores:

z=which is an extreme or a typical value.

C. M=66 for n=16 scores:

z=which is an extreme or a typical value

D. M=66 for n=36 scores

z=, which is a typical or an extreme value.