

   DDaatteess ooff CCooaall MMiinniinngg DDiissaasstteerrss

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

       date: The date of the disaster.  The integer part of
             `date' gives the year.  The day is represented as
             the fraction of the year that had elapsed on that
             day.

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

        The `coal' data frame has 191 rows and 1 columns.

        This data frame gives the dates of 191 explosions in
        coal mines which resulted in 10 or more fatalities.
        The time span of the data is from March 15, 1851 until
        March 22 1962.

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

        This data frame contains the following column:

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

        The data were obtained from

        Hand, D.J., Daly, F., Lunn, A.D., McConway, K.J. and
        Ostrowski, E. (1994) A Handbook of Small Data Sets,
        Chapman and Hall.

   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.

        Jarrett, R.G. (1979) A note on the intervals between
        coal-mining disasters.  Biometrika, 66, 191-193.

