Calculate the sample variance and sample standard deviation 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
6.51 - 8.50 50
8.51 - 10.50 18
10.51 - 12.50 42
12.51 - 14.50 20
14.51 - 16.50 46