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Solve 4 In a random sample of 25 of 160 employees of a company, the mean number of hours of overtime billed in the week

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4 In a random sample of 25 of 160 employees of a company, the mean number of hours of overtime billed in the week of Christmas was 6.5, with the sample standard deviation of 5.2 hours. Find the lower limit of a 95% confidence interval for the total number of hours of overtime billed during the week. Type your numerical answer here. Numbers only

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