Question

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 z-score 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 z-score 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

Answer 1

Z = (score-mean)/SEm

SEm = SD/√n