Failures of Air-conditioning Equipment

SUMMARY:
       Proschan (1963) reported on the times between failures  of
       the  air-conditioning equipment in 10 Boeing 720 aircraft.
       The aircondit data frame contains the  intervals  for  the
       ninth  aircraft  while  aircondit7  contains those for the
       seventh aircraft.

       Both data frames have just one column.  Note that the data
       have been sorted into increasing order.

DATA DESCRIPTION:
       The data frames contain the following column:

hours:    The time interval in hours between successive  failures
       of the air-conditioning equipment

SOURCE:
       The data were taken from

       Cox, D.R.  and  Snell,  E.J.  (1981)  Applied  Statistics:
       Principles and Examples. Chapman and Hall.

OTHER REFERENCES:
       Davison, A.C. and Hinkley, D.V. (1997)  Bootstrap  Methods
       and Their Application. Cambridge University Press.

       Proschan, F. (1963) Theoretical  explanation  of  observed
       decreasing failure rate. Technometrics, 5, 375-383.