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\name{ex13.34}\alias{ex13.34}\title{data from exercise 13.34}\description{The \code{ex13.34} data frame has 13 rows and 2 columns.}\format{This data frame contains the following columns:\describe{\item{cations}{a numeric vector}\item{exchange}{a numeric vector}}}\details{}\source{Devore, J. L. (2000) \emph{Probability and Statistics for Engineering and the Sciences (5th ed)}, Duxbury}\examples{data(ex13.34)}\keyword{datasets}