coal                  package:boot                  R Documentation

Dates of Coal Mining Disasters

Description:

     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.

Usage:

     coal

Format:

     This data frame contains the following column:

     '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.

Source:

     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.

References:

     Davison, A.C. and Hinkley, D.V. (1997)  _Bootstrap Methods and
     Their Application_. Cambridge University Press.

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

