A population forms a normal distribution with a mean of = 80 and a standard deviation

Question:

A population forms a normal distribution with a mean of μ = 80 and a standard deviation of σ = 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

Distribution
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