You are the Vice President for Human Resources at XYZ Investment Management, Inc. Your employees have recently complained about their long working hours. You collected a sample of 49 weekly timesheets and calculated an average of 41.5 hours with a standard deviation of 2.5 hours.
Using a significance level of 0.01, can you conclude that your employees work more than 40 hours per week?
This solution shows details of a hypothesis test for a mean.