R/acfail.R

In trobinj/trtools: Miscellaneous Tools for Teaching Statistics

#' Failures of air conditioning equipment. 
#'
#' Successive times until failure of air conditioning equipment on Boeing 720 aircraft. 
#'
#' @format A data frame of 213 observations on two variables.
#' \describe{
#'    \item{aircraft:}{identifier of the aircraft}
#'    \item{time:}{time until failure (hours)}
#' }
#'
#' @note The data are from Proschan (1963) who reported times between successive failures on each plane. Gaver and O'Muircheartaigh (1987) featured the same data but as the number of failures for each aircraft. 
#'
#' @source Gaver, D. P. & O'Muircheartaigh, I. G. (1987). Robust empirical Bayes analysis of event rates. \emph{Technometrics}, \emph{29}, 1--15.
#' 
#' Proschan, F. (1963). Theoretical explanation of observed decreasing failure rate. \emph{Technometrics}, \emph{5}, 375--383.
"acfail"