The following data represent the number of live multiple-delivery births (three or more babies) in 2012 for women 15 to 54 years old.

Age Number of Multiple Births

15-19...................................................44

20-24.................................................404

25-29................................................1204

30-34................................................1872

35-39................................................1000

40-44.................................................332

45-49...................................................44

50-54...................................................19

(a) Approximate the mean and standard deviation for age.

(b) Draw a frequency histogram of the data to verify that the distribution is bell shaped.

(c) According to the Empirical Rule, 95% of mothers of multiple births will be between what two ages?