R/statepop.R

In SDaA: Sampling: Design and Analysis

#' Unequal-Probability Sample of Counties in the US
#' 
#' counties selected with probability proportional to 1992 population
#' @name statepop
#' @docType data
#' @format \describe{
#'   \item{state}{state abbreviation}
#'   \item{county}{county}
#'   \item{landarea}{land area of country, 1990 (square miles)}
#'   \item{popn}{population of county, 1992}
#'   \item{phys}{number of physicians, 1990}
#'   \item{farmpop}{farm population, 1990}
#'   \item{numfarm}{number of farms, 1987}
#'   \item{farmacre}{number of acres devoted to farming, 1987}
#'   \item{veterans}{number of veterans, 1990}
#'   \item{percviet}{percent of veterans from Vietnam era, 1990}
#' }
#' @source City and Counties Book, 1994
#' @references Lohr (1999). Sampling: Design and Analysis, Duxbury, p. 190  -- 192 and
#'   444.
#' @export
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