R/counties.R

In SDAResources: Datasets and Functions for 'Sampling: Design and Analysis, 3rd Edition'

#' counties data
#'
#' 
#'Data (from 1990) from an SRS of 100 of the 3141 counties in the United
#' States. Missing values are coded as NA.
#'
#'
#' @format This data frame contains the following columns:
#' \describe{
#' 
#'  \item{RN:}{random number used to select the county}
#'  
#'  \item{state:}{state abbreviation}
#'  
#'  \item{county:}{county name}
#'  
#'  \item{landarea:}{land area, 1990 (square miles)}
#'  
#'  \item{totpop:}{total number of persons, 1992}
#'  
#'  \item{physician:}{active non-Federal physicians on Jan. 1, 1990}
#'  
#'  \item{enroll:}{school enrollment in elementary or high school, 1990}
#'  
#'  \item{percpub:}{percent of school enrollment in public schools}
#'  
#'  \item{civlabor:}{civilian labor force, 1991}
#'  
#'  \item{unemp:}{number unemployed, 1991}
#'  
#'  \item{farmpop:}{farm population, 1990}
#'  
#'  \item{numfarm:}{number of farms, 1987}
#'  
#'  \item{farmacre:}{acreage in farms, 1987}
#'  
#'  \item{fedgrant:}{total expenditures in federal funds and grants, 1992 (millions of dollars)}
#'  
#'\item{fedciv:}{civilians employed by federal government, 1990}
#'
#'\item{milit:}{military personnel, 1990}
#'
#'\item{veterans:}{number of veterans, 1990}
#'
#'\item{percviet:}{percent of veterans from Vietnam era, 1990}
#'  
#'    }
#'      
#'          
#'
#' @docType data
#'
#' @usage data(counties)
#'
#'
#'
#' @keywords datasets
#' 
#'@references Source: U.S. Census Bureau (1994).
#'
#' @references Lohr (2021), Sampling: Design and Analysis, 3rd Edition. Boca Raton, FL: CRC Press.
#' 
#'@references Lu and Lohr (2021), R Companion for \emph{Sampling: Design and Analysis, 3rd Edition}, 1st Edition. Boca Raton, FL: CRC Press.
#' 
#'
#' 
#' 
#' 
"counties"