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. Each of the following samples was obtained from a population with (pop mean)= 80 and SD= 12. Find the z-score corresponding to each sample

. Each of the following samples was obtained from a population with (pop mean)= 80 and SD= 12. Find the z-score corresponding to each sample mean.

a. M = 83 for a sample of n = 4

b. M = 76 for a sample of n = 9

(please help with showing how this is calculated, I would like to learn the process)

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