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\name{ex06.09}\alias{ex06.09}\docType{data}\title{data from exercise 6.9}\description{The \code{ex06.09} data frame has 8 rows and 2 columns.}\format{This data frame contains the following columns:\describe{\item{scratches}{a numeric vector}\item{frequency}{a numeric vector}}}%\details{}\source{Devore, J. L. (2003) \emph{Probability and Statistics for Engineering and the Sciences (6th ed)}, Duxbury}\examples{data(ex06.09)}\keyword{datasets}