#' Chapter 12.3 Problem#10: Pulse Rates
#'
#' Pulse rates (bpm) by age category (under or over 30) and sex.
#' \itemize{
#' \item pulse.rate
#' \item Sex
#' \item Age (categorical as over or under 30)
#' }
#'
#' @format A data frame with 40 rows and 3 variables
#' @source Triola, M. 2014. Elementary Statistics, 12th ed. Boston, MA: Pearson.
#' @name ch12p10
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