1.A random sample of voters in Nashville, Tennessee, is classified by age group, as shown by the following data.

Age Group

Frequency

18 - under 24 = 17

24 - under 30=22

30 - under 36=26

36 - under 42=35

42 - under 48=33

48 - under 54=30

54 - under 60=32

60 - under 66=21

66 - under 72=15

a.Calculate the mean. (4 points)

b.Calculate the mode. (4 points)

c.Calculate the median. (4 points)

d.Calculate the variance. (4 points)

e.Calculate the standard deviation. (4 points)