R/coots.R

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

#' coots data
#'
#' 
#' Selected information on egg size, from a larger study by Arnold (1991). Data
#'provided courtesy of Todd Arnold. Not all observations are used for this data set, so results
#'may not agree with those in Arnold (1991).
#'
#'
#' @format This data frame contains the following columns:
#'
#'\describe{
#'\item{clutch:}{clutch number from which eggs were subsampled}
#'
#'\item{csize:}{number of eggs in clutch (\eqn{M_i})}
#'
#'\item{length:}{length of egg (mm)}
#'
#'\item{breadth:}{maximum breadth of egg (mm)}
#'
#'\item{volume:}{calculated as 0.000507*length*\eqn{breadth^2} (\eqn{mm^3})}
#'
#'\item{tmt:}{
#'
#'= 1 if received supplemental feeding
#'
#'= 0 otherwise}
#'}
#'
#' @docType data
#'
#' @usage data(coots)
#'
#'
#'
#' @keywords datasets
#' 
#'@references Arnold, T. W. (1991). Intraclutch variation in egg size of American coots. \emph{The Condor 93},
#' 19–27.
#'
#' @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.
#' 
#'
"coots"