

   PPooppuullaattiioonn ooff UU..SS.. CCiittiieess

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

          u: The 1920 population.

          x: The 1930 population.

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

        The `bigcity' data frame has 49 rows and 2 columns.

        The `city' data frame has 10 rows and 2 columns.

        The measurements are the population (in 1000's) of 49
        U.S. cities in 1920 and 1930.  The 49 cities are a ran-
        dom sample taken from the 196 largest cities in 1920.
        The `city' data frame consists of the first 10 observa-
        tions in `bigcity'.

   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

        Cochran, W.G. (1977) Sampling Techniques. Third edi-
        tion. 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.

