R/data-penny_ages.R

In openintro: Data Sets and Supplemental Functions from 'OpenIntro' Textbooks and Labs

#' Penny Ages
#'
#' Sample of pennies and their ages. Taken in 2004.
#'
#'
#' @name penny_ages
#' @aliases penny.ages penny_ages
#' @docType data
#' @format A data frame with 648 observations on the following 2 variables.
#' \describe{
#'   \item{year}{Penny's year.}
#'   \item{age}{Age as of 2004.}
#'   }
#' @keywords datasets
#' @examples
#'
#' hist(penny_ages$year)
"penny_ages"