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# A sample of n = 4 scores is selected from a population with = 50 and = 12. If the sample mean is M = 56, what is the z-score for this sample mean?

A sample of n = 4 scores is selected from a population with μ = 50 and σ = 12. If the sample mean is M = 56, what is the z-score for this sample mean?
Answer

0.50

1.00

2.00

4.00
Please show a formula to this problem....Thank you

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