The data on the next page represent the male and female population, by age, of the United States in 2012.

(a) Approximate the population mean and standard deviation of age for males.
(b) Approximate the population mean and standard deviation of age for females.
(c) Which gender has the higher mean age?
(d) Which gender has more dispersion in age?

Transcribed Image Text:

Age Male Resident Pop Female Resident Pop 0-9 20,700,000 19,826,000 21,369,000 10-19 20,475,000 21,355,000 20-29 21,417,000 20,011,000 30-39 19,455,000 21,532,000 40-49 20,839,000 20,785,000 50-59 22,058,000 14,739,000 16,362,000 60-69 70-79 7,641,000 9,474,000 2 80 4,230,000 6,561,000