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A normal population has a mean of 77 and a standard deviation of 8. You select a sample of 36. Use Appendix B.1 for the

A normal population has a mean of 77 and a standard deviation of 8. You select a sample of 36. 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 finalanswers to 4 decimal places.)

a. Less than 74.

Probability

b. Between 74 and 80.

Probability

c. Between 80 and 81.

Probability

d. Greater than 81.

Probability

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