

   FFaaiilluurree TTiimmee ooff PPEETT FFiillmm

   AArrgguummeennttss::

       volt: The voltage (in kV).

       time: The failure or censoring time in hours.

       cens: The censoring indicator; `1' means right-censored
             data.

   SSUUMMMMAARRYY::

        The `hirose' data frame has 44 rows and 3 columns.

        PET film is used in electrical insulation.  In this
        accelerated life test the failure times for 44 samples
        in gas insulated transformers.  4 different voltage
        levels were used.

   DDAATTAA DDEESSCCRRIIPPTTIIOONN::

        This data frame contains the following columns:

   SSOOUURRCCEE::

        The data were obtained from

        Hirose, H. (1993) Estimation of threshold stress in
        accelerated life-testing.  IEEE Transactions on Relia-
        bility, 42, 650-657.

   OOTTHHEERR RREEFFEERREENNCCEESS::

        Davison, A.C. and Hinkley, D.V. (1997) Bootstrap Meth-
        ods and Their Application. Cambridge University Press.

