Calculate the sample mean and sample variance for the following frequency distribution of hourly wages for a sample of pharmacy assistants. If necessary, round to one more decimal place than the largest number of decimal places given in the data. Hourly Wages (in Dollars] Class Frequency 10.01 - 11.50 44 11.51 - 13.00 27 13,01 - 14.50 38 14 51 - 16.00 33 16.01 - 17.50 40