Math
posted by Tracy .
I need help with this these two problem PLEASE!!!
For a population with a mean of μ 80 and a standard
deviation of 12, find the zscore corresponding to
each of the following samples.
a. M 83 for a sample of n 4 scores
b. M 83 for a sample of n 16 scores
c. M 83 for a sample of n 36 scores
A population forms a normal distribution with a mean
of μ 80 and a standard deviation of 15. For
each of the following samples, compute the zscore for
the sample mean and determine whether the sample
mean is a typical, representative value or an extreme
value for a sample of this size.
a. M 84 for n 9 scores
b. M 84 for n 100 scores

Z = (scoremean)/SEm
SEm = SD/√n