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At a large company, the...

At a large company, the director of research found that the average work time lost by employees due to accidents was 99 hours per year. She used a random sample of 20 employees. The standard deviation of the sample was 5.7 hours. Estimate the population mean for the number of hours lost due to accidents for the company, using a 99% confidence interval. Assume the variable is normally distributed.

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