#' Dataset for Exercise X, Chapter 03
#'
#' Dataset for Exercise X, Chapter 03
#'
#' @format A \code{data.frame} with 11 rows and 6 variables:
#' \describe{
#' \item{x123}{}
#' \item{y1}{}
#' \item{y2}{}
#' \item{y3}{}
#' \item{x4}{}
#' \item{y4}{}
#' }
#' @source Draper, N.R., Smith, H., (1998) Applied Regression Analyis, 3rd ed., New York: Wiley
#' @examples
#' dse03x
'dse03x'
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