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Discuss about mean alteration of the waists of sports coats

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Question: Marketing and Consumer Behavior The owner of a small tailoring shop keeps careful records of all alterations. Two common alterations to men's clothing are lengthening the inseam on pants and letting out a sports coat around the waist. A random sample of each type of alteration was obtained, and the summary statistics are given in the table below. Measurements are in inches.

2207_Alteration.png

a. Find a 95% confidence interval for the mean alteration of the inseams on men's pants.

b. How large a sample is necessary for the bound on the error of estimation to be 0.05 for the confidence interval in part (a)?

c. Find a 90% confidence interval for the mean alteration of the waists of sports coats.

d. How large a sample is necessary for the bound on the error of estimation to be 0.07 for the confidence interval in part (c)?

Reference no: EM131747682

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