statepop {SDAResources}

statepop data

Description

Data from an unequal-probability sample of 100 counties from the 1994 County and City Data Book (U.S. Census Bureau, 1994). The sample was selected with probability proportional to population.

Usage

data(statepop)

Format

This data frame contains the following columns:

county:

county name (character variable, length 14)

state:

state name (character variable)

landarea:

land area of county, 1990 (square miles)

popn:

population of county, 1992

phys:

number of physicians, 1990

farmpop:

farm population, 1990

numfarm:

number of farms, 1987

farmacre:

number of acres devoted to farming, 1987

veterans:

number of veterans, 1990

percviet:

percent of veterans from Vietnam era, 1990

psii:

probability of selection

wt:

sampling weight, = 1/(100\psi_i)

References

Lohr (2021), Sampling: Design and Analysis, 3rd Edition. Boca Raton, FL: CRC Press.

Lu and Lohr (2021), R Companion for Sampling: Design and Analysis, 3rd Edition, 1st Edition. Boca Raton, FL: CRC Press.