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Find the z score for sample

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Reference no: EM131402718

A sample of n=4 scores has a mean of M=75 find the z score for this sample:

a. If it was obtained from a population with u =80 and o=10

b. If it was obtained from a population with u=80 and o=20

c. If it was obtained from a population with u=80 and o=40

Reference no: EM131402718

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