The U.S. Census bureau serves as the leading source of quantitative data about the nation's people and economy. The following cross tabulation shows the number of households (1000s) and the household income by the level of education for heads of household having received a high school degree or more education (U.S. Census bureau website, 2013).

a. Construct a percent frequency distribution for the level of education variable. What percentage of heads of households have a master's or doctoral degree?
b. Construct a percent frequency distribution for the household income variable. What percentage of households have an income of $50,000 or more?
c. Convert the entries in the cross tabulation into column percentages. Compare the level of education of households with a household income of under $25,000 to the level of education of households with a household income of $100,000 or more. Comment on any other items of interest when reviewing the cross tabulation showing column percentages.

Household Income Level of Education High school graduate Bachelor's degree Master's degree Doctoral degree Under $25,000 9880 2484 685 79 13,128 $25,000 to $49,999 9970 4164 1205 160 15,499 $50,000 to $99,999 9441 7666 3019 422 20,548 $100,000 and Over 3482 7817 4094 1076 16,469 Total 32,773 22,131 9003 1737 65.644 Total