#' Dataset from Table 25.2
#'
#' Dataset from Table 25.2
#'
#' @format A \code{data.frame} with 20 rows and 3 variables:
#' \describe{
#' \item{type}{}
#' \item{y1974}{}
#' \item{y1992}{}
#' }
#' @source Draper, N.R., Smith, H., (1998) Applied Regression Analyis, 3rd ed., New York: Wiley
#' @examples
#' dst252
'dst252'
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