A sample of n=4 scores is selected from a normal population with u = 50 and G = 12. If the sample mean is M= 56, what is the z-score for this sample mean? O a 0.50 4.00 Oc 1.00 Od. 2.00

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A sample of n = 4 scores is selected from a normal population with u = 50 and o = 12. If the sample mean is M= 56, what is the z-score for this sample mean?
O a. 0.50
O b. 4,00
O c. 1.00
O d. 2.00
Transcribed Image Text:A sample of n = 4 scores is selected from a normal population with u = 50 and o = 12. If the sample mean is M= 56, what is the z-score for this sample mean? O a. 0.50 O b. 4,00 O c. 1.00 O d. 2.00
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