The following cross tabulation shows household income by educational level of the head of household (Statistical Abstract of the United States: 2008).
a. Compute the row percentages and identify the percent frequency distributions of income for households in which the head is a high school graduate and in which the head holds a bachelor’s degree.
b. What percentage of households headed by high school graduates earn $75,000 or more? What percentage of households headed by bachelor’s degree recipients earn $75,000 or more?
c. Construct percent frequency histograms of income for households headed by persons with a high school degree and for those headed by persons with a bachelor’s degree. Is any relationship evident between household income and educational level?
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