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# Denise is a professional swimmer who trains, in part, by running. She would like to estimate the average number of miles she runs each week. For a...

Denise is a professional swimmer who trains, in part, by running. She would like to estimate the average number of miles she runs each week. For a random sample of 20 weeks, the mean is =17.5 miles with standard deviation s=3.8 miles. Find a 99% confidence interval for the population mean number of weekly miles Denise runs.