Median:  grouped data
		Money Income of Households, 1998 (in 1,000’s)
				Household $												f						Cumulative f
					< $10,000									10,705										10,705
			$10,000-14,999												8,093									18,798
			$15,000-24,999											14,587										33,385
			$25,000-34,999											13,698										47,083
			$35,000-49,999											16,660										63,743
			$50,000-74,999											19,272										83,015
						$75,000+								20,860									103,875
	Source:  U.S. Census Bureau, Statistical Abstract of the U.S., 2000, Table 738.