A Company Is Interested in Estimating μ,The Mean Number of Days

question 45

Essay

A company is interested in estimating μ,the mean number of days of sick leave taken by its employees.The firm's statistician randomly selects 100 personnel files and notes the number of sick days taken by each employee.The sample mean is 12.2 days,and the sample standard deviation is 10 days.Calculate a 95 percent confidence interval for μ,the mean number of days of sick leave.

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