\name{ex13.34} \alias{ex13.34} \docType{data} \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. (2003) \emph{Probability and Statistics for Engineering and the Sciences (6th ed)}, Duxbury } \examples{ data(ex13.34) } \keyword{datasets}