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A normal population has a mean of 57 and a standard deviation of 13. You select a random sample of 9. Compute the probability the

A normal population has a mean of 57 and a standard deviation of 13. You select a random sample of 9.

Compute the probability the sample mean is(Round z values to 2 decimal places and final answers to 4 decimal places):

a.	Greater than 60.

Probability

b.	Less than 55.

Probability

c.	Between 55 and 60.

Probability

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