#' Dataset for Exercise U, Chapter 14
#'
#' Dataset for Exercise U, Chapter 14
#'
#' @format A \code{data.frame} with 15 rows and 4 variables:
#' \describe{
#' \item{z1}{}
#' \item{z2}{}
#' \item{z3}{}
#' \item{y}{}
#' }
#' @source Draper, N.R., Smith, H., (1998) Applied Regression Analyis, 3rd ed., New York: Wiley
#' @examples
#' dse14u
'dse14u'
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