R/shapespop.R

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

#' shapespop data
#'
#' 
#' Population of black and gray squares and circles.
#'
#'
#' @format This data frame contains the following columns:
#' \describe{
#' \item{ID:}{identification number for object}
#' 
#' \item{shape:}{shape of object (square or circle)}
#' 
#' \item{color:}{color of object (gray or black)}
#' 
#' \item{area:}{area of object (\eqn{cm^2})}
#' 
#' \item{conv:}{= 1 if object can be reached through convenience sample
#' 
#'  = 0 otherwise}
#' }
#'  
#'  
#'  
#'
#' @docType data
#'
#' @usage data(shapespop)
#'
#'
#'
#' @keywords datasets
#'
#' @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. 
#' 
#'
#' 
#' 
#' 
"shapespop"