Do male and female servers at Swank Bar work the same number of hours? A sample of 70 female servers worked an average of 28 hours per week, with a standard deviation of 5. A sample of 70 male servers worked an average of 31 hours per week, with a standard deviation of 3. Let /1 and /2 represent the typical number of hours worked by all female and male servers at Swank Bar, respectively. Estimate with a 97% confidence level how many more hours female servers work. Round answers to two decimal places.