#' Severity of disturbed dreams
#'
#' @description Boy's disturbed dreams benchmark dataset drawn from a study that cross-classified boys by their age, and the severity (not severe, severe 1, severe 2, very severe) of their disturbed dreams (Maxwell, 1961).
#'
#' @docType data
#' @usage data(DisturbedDreams)
#'
#' @format A dataframe containing :
#' \describe{
#' \item{Age}{Individuals age}
#' \item{Level}{Severity level: Not.severe, Severe.1, Severe.2, Very.severe.}
#' }
#'
#' @keywords datasets
#'
#' @references
#' Maxwell, A.E. (1961) \emph{Analyzing qualitative data}, Methuen London, 73.
#' @examples
#' data(DisturbedDreams)
"DisturbedDreams"
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