Mathematics, 01.04.2020 21:07 CXS2003

A random sample of the costs of repair jobs at a large muffler repair shop produces a mean of $127.95 and a standard deviation of $24.03.

If the size of the random sample is 40, calculate the 90 percent confidence interval for the average cost of the repair at this repair shop.

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A random sample of the costs of repair jobs at a large muffler repair shop produces a mean of $127.9...