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  3. the mean life expectancy of men in the u.s. is 78

The Mean life expectancy of Men in the U.S. is 78 years , with a population...

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Statistics

The Mean life expectancy of Men in the U.S. is 78 years , with apopulation standard deviation of 7 years. A new study is using arandom sample of 64 men to study life expectancy.

A. What is the Shape, Mean (expected value) and standarddeviation of the sampling distribution of the sample mean for thisstudy?

B. What is the probability that the sample mean will be largerthan 80 years?

C. What is the probability that the sample mean will be lessthan 80 years?

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