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A normal population has a mean of 89 and a standard deviation of 8. You select...

A normal population has a mean of 89 and a standard deviation of 8. You select a sample of 35. Use Appendix B.1 for the z-values. Compute the probability that the sample mean is: (Round the z-values to 2 decimal places and the final answers to 4 decimal places.)

a. Less than 87.

Probability

b. Between 87 and 91

Probability

c. Between 91 and 92.

Probability

d. Greater than 92.

Probability

Math   Statistics-And-Probability   
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