Data from an SRS of 100 of the 3141 Counties in the U.S.
countiesData frame with the following 18 variables:
random number used to select the country
state (two-letter abbreviation)
county
land area, 1990 (square miles)
total population, 1992
active nonfederal physicians on Jan. 1, 1990
school enrollment in elementary or high school, 1990
percent of school enrollment in public schools
civilian labor force, 1991
number unemployed, 1991
farm population, 1990
number of farms, 1987
acreage in farms, 1987
total expenditures in federal funds and grants, 1992 (millions of dollars)
civilians employed by federal government, 1990
military personnel, 1990
number of veterans, 1990
percentage of veterans from Vietnam era, 1990
Lohr (1999). Sampling: Design and Analysis, Duxbury, p. TODO and 440.