\HeaderA{bigcity}{Population of U.S. Cities}{bigcity}
\aliasA{city}{bigcity}{city}
\keyword{datasets}{bigcity}
\begin{Description}\relax
The \code{bigcity} data frame has 49 rows and 2 columns. 


The \code{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 random sample taken from the 196 largest cities in 1920.  The \code{city} data 
frame consists of the first 10 observations in \code{bigcity}.
\end{Description}
\begin{Usage}
\begin{verbatim}
bigcity
\end{verbatim}
\end{Usage}
\begin{Format}\relax
This data frame contains the following columns:


\describe{
\item[\code{u}] The 1920 population.

\item[\code{x}] The 1930 population.
}
\end{Format}
\begin{Source}\relax
The data were obtained from


Cochran, W.G. (1977) \emph{Sampling Techniques}. Third edition. John Wiley
\end{Source}
\begin{References}\relax
Davison, A.C. and Hinkley, D.V. (1997) \emph{Bootstrap Methods and Their Application}. Cambridge University Press.
\end{References}