

   BBrraaiinn aanndd BBooddyy WWeeiigghhttss iinn MMaammmmaallss

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

       body: The average body weight for the species (in kilo-
             grammes).

      brain: The average brain weight for the species (in
             grammes).

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

        The `mammals' data frame has 62 rows and 2 columns.

        The data give average brain weight and average body
        weight for 62 different species of land mammals.  Each
        row in the data frame is named with the name of the
        species whose measurements are in the row.

   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

        Weisberg, S. (1985) Applied Linear Regression (Second
        edition).  John Wiley.

   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.

        Venables, W.N. and Ripley, B.D. (1994) Modern Applied
        Statistics with S-Plus. Springer-Verlag.

