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(aircondit)
Cox, D.R. and Snell, E.J. (1981) Applied Statistics: Principles and Examples. Chapman and Hall.
Proschan, F. (1963) Theoretical explanation of observed decreasing failure rate. Technometrics, 5, 375-383.