The following crosstabulation shows household income by educational level of the head of household (Statistical Abstract of the United States: 2008).

Male Golfers Female Golfers Greens Condition Greens Condition Handicap Too Fast Fine Handicap Too Fast Fine Under 15 10 40 Under 15 1 9 15 or more 25 25 15 or more 39 51 Household Income ($1000s)

Under 25.0– 50.0– 75.0– 100 or Educational Level 25 49.9 74.9 99.9 more Total Not H.S. graduate 4207 3459 1389 539 367 9961 H.S. graduate 4917 6850 5027 2637 2668 22099 Some college 2807 5258 4678 3250 4074 20067 Bachelor’s degree 885 2094 2848 2581 5379 13787 Beyond bach. deg. 290 829 1274 1241 4188 7822 Total 13106 18490 15216 10248 16676 73736

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?