#' Soft Drink Data Set.
#' 
#' Consists of 15 samples of 10 bottles where it is measured the volume of soft
#' drink.
#' 
#' 
#' @name softdrink
#' @docType data
#' @format A data frame with 15 lines and 10 columns.  
#' \describe{
#' \item{x1}{The first measure.} 
#' \item{x2}{The second measure.}
#' \item{x3}{The third measure.} 
#' \item{x4}{The fourth measure.}
#' \item{x5}{The fifth measure.} 
#' \item{x6}{The sixth measure.}
#' \item{x7}{The seventh measure.} 
#' \item{x8}{The eigth measure.} 
#' \item{x9}{The ninth measure.} 
#' \item{x10}{The tenth
#' measure.} }
#' @source Montgomery, D.C.,(2001)."Introduction to Statistical Quality
#' Control".4th ed. Wiley.
#' @examples
#' 
#' data(softdrink)
#' 
NULL