4. The manager at Target looked at the schedule for all of her part-time employees and noted the amount of hours that they work per week. The data is given in the table below. Find the mean, variance, and standard deviation of the amount of hours worked per week by her part-time employees. Round your answers to one decimal place. In order to receive full credit on this problem, make sure to show the values that you are getting in your L1, L2, L3, and L4. Hours Worked Frequency Per Week 12 - 15 37 16 - 19 58 20 - 24 18 25 - 39 16 Section 3.4: Measures of Position and Outliers