trtools: Miscellaneous Tools for Teaching Statistics

#' Sample of transects of pale white larkspur.
#'
#' Sample of 20 one-meter belt transects to estimate the abundance of pale white larkspur in a given region. The total number of sampling units in the sampling frame is 150 belt transects with a total area of 5897 square meters.
#'
#' @format A data frame with 20 observations and two variables:
#' \describe{
#'    \item{plants}{abundance in a sampled transect}
#'    \item{area}{sampled transect area in square meters}
#' }
#'
#' @note Although not stated explicitly in the source, the sample was presumably obtained using simple random sampling.
#'
#' @source Stehman, S. V., & Salzer, D. W. 2000. Estimating density from surveys employing unequal-area belt transects. \emph{Wetlands}, \emph{20}, 512-519.
#'
#' Gregoire, T. G., & Valentine, H. T. (2007). \emph{Sampling strategies for natural resources and the environment}. Boca Raton, FL: Chapman & Hall/CRC.
"larkspur"