In an article in the Journal of Management, Joseph Martocchio studied and estimated the costs of employee absences. Based on a sample of 176 blue-collar workers, Martocchio estimated that the mean amount of paid time lost during a three-month period was 1.3 days per employee with a standard deviation of 1.4 days. Martocchio also estimated that the mean amount of unpaid time lost during a three-month period was 1.1 day per employee with a standard deviation of 1.6 days.
Suppose we randomly select a sample of 100 blue-collar workers. Based on Martocchio
