Question: Shown is a frequency distribution for the number of inches of rain received in one year in 25 selected cities in the United States.

Number of inches Frequency

5.5-20.5 2

20.5-35.5 3

35.5-50.5 8

50.5-65.5 6

65.5-80.5 3

80.5-95.5 3

Find each of the following: Must use formulas and show work.

a) mean

b) median

c) modal class

d) variance

e) standard deviation