\Header{aircondit}{Failures of Air-conditioning Equipment}
\alias{aircondit7}{aircondit}
\keyword{datasets}{aircondit}
\begin{Description}\relax
Proschan (1963) reported on the times between failures of the air-conditioning
equipment in 10 Boeing 720 aircraft. The \code{aircondit} data frame contains 
the intervals for the ninth aircraft while \code{aircondit7} contains those for the
seventh aircraft. 


Both data frames have just one column.  Note that the data have been sorted 
into increasing order.
\end{Description}
\begin{Usage}
\begin{verbatim}
data(aircondit)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
The data frames contain the following column:


\describe{
\item[\code{hours}] The time interval in hours between successive failures of the air-conditioning
equipment
}
\end{Format}
\begin{Source}\relax
The data were taken from


Cox, D.R. and Snell, E.J. (1981) 
\emph{Applied Statistics: Principles and Examples}. Chapman and Hall.
\end{Source}
\begin{References}\relax
Davison, A.C. and Hinkley, D.V. (1997) 
\emph{Bootstrap Methods and Their Application}. Cambridge University Press.


Proschan, F. (1963) Theoretical explanation of observed decreasing failure 
rate. \emph{Technometrics}, \bold{5}, 375-383.
\end{References}

