Question

A sample with M = 85 and s = 12 is transformed into z-scores. After the...

A sample with M = 85 and s = 12 is transformed into z-scores. After the transformation, what are the values for the mean and standard deviation for the sample of z-scores?

Explain how to get M=0 and S=1 as final answer please.

Math   Statistics-And-Probability   
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Answer #1

z-scores are the standarized scores for aby distribution.

It is scores of standard normal distribution. Mean and standard deviaiton of z-scores is 0 and 1.

So 0 and 1  are the values for the mean and standard deviation for the sample of z-scores.

If x~ N( ) then z~ N ( 0 , 1 )

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