Male and female populations of humpbackwhales under 80 years old are represented by age in the table below. Complete parts(a) through(d).

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

=____(Round to two decimal places asneeded.)

Age

Age Males Females

0-9 12 6

10-19 12 9

20-29 17 15

30-39 19 18

40-49 23 21

50-59 22 25

60-69 16 20

70-79 14 14