Age and Gender. The U.S. Census Bureau publishes census data on the resident population of the United States in Current Population Survey. According to that document, 7.3% of male residents are in the age group 20–24 years.

a. If no association exists between age group and gender, what percentage of the resident population would be in the age group 20–24 years? Explain your answer.

b. If no association exists between age group and gender, what percentage of female residents would be in the age group 20–24 years? Explain your answer.

c. There are about 158 million female residents of the United States.

If no association exists between age group and gender, how many female residents would there be in the age group 20–24 years?

d. In fact, there are some 10.9 million female residents in the age group 20–24 years. Given this number and your answer to part (c), what do you conclude?