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\name{bigcity}\alias{bigcity}\alias{city}\title{Population of U.S. Cities}\description{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 thepopulation (in 1000's) of 49 U.S. cities in 1920 and 1930. The 49 cities area random sample taken from the 196 largest cities in 1920. The \code{city} dataframe consists of the first 10 observations in \code{bigcity}.}\usage{bigcity}\format{This data frame contains the following columns:\describe{\item{\code{u}}{The 1920 population.}\item{\code{x}}{The 1930 population.}}}\source{The data were obtained fromCochran, W.G. (1977) \emph{Sampling Techniques}. Third edition. John Wiley}\references{Davison, A.C. and Hinkley, D.V. (1997) \emph{Bootstrap Methods and Their Application}. Cambridge University Press.}\keyword{datasets}% Converted by Sd2Rd version 1.15.