Construct a 95 confidence interval estimate of the mean

A sample of nine fastballs thrown by a certain pitcher were measured at speeds of 94, 87, 80, 91, 85, 102, 85, 80, 93 miles per hour.

a. What is the point estimate of the mean speed of this pitcher's fastball?

b. Construct a 95% confidence interval estimate of the mean speed. Assume the distribution is normal.

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You can have 55000 per year for the next two years payable : you have just been offered a job. you have the choice of two different salary arrangements. you can have 55000 per year

Construct a 95 confidence interval estimate of the mean : a sample of nine fastballs thrown by a certain pitcher were measured at speeds of 94 87 80 91 85 102 85 80 93 miles per

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