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A normal distribution has a mean of = 60 and a standard deviation of = 18. For each of the following samples, compute the z-score

A normal distribution has a mean of = 60 and a standard deviation of = 18. 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 = 67 for n = 4 scores

b. M = 67 for n = 36 scores

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