#' Binomial Data.
#' 
#' This is a binomial data set used on P-charts.
#' 
#' 
#' @name binomdata
#' @docType data
#' @format A data frame with 25 observations on the following 4 variables.
#' \describe{ 
#' \item{i}{Index.} 
#' \item{ni}{The sample Size.}
#' \item{Di}{Number of non-conforming units per sample.}
#' \item{pi}{Proportion of non-conforming units per sample.} }
#' @source Montgomery, D.C.,2001."Introduction to Statistical Quality Control".
#' @examples
#' 
#' data(binomdata)
#' 
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