#' Dataset for Exercise G-2, Chapter 23
#'
#' Dataset for Exercise G-2, Chapter 23
#'
#' @format A \code{data.frame} with 15 rows and 9 variables:
#' \describe{
#' \item{level}{}
#' \item{tube}{}
#' \item{x1}{}
#' \item{x2}{}
#' \item{x3}{}
#' \item{x4}{}
#' \item{x5}{}
#' \item{x6}{}
#' \item{y}{}
#' }
#' @source Draper, N.R., Smith, H., (1998) Applied Regression Analyis, 3rd ed., New York: Wiley
#' @examples
#' dse23g_2
'dse23g_2'
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