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R version 2.9.0 Under development (unstable) (2009-01-28 r47758)Copyright (C) 2009 The R Foundation for Statistical ComputingISBN 3-900051-07-0R is free software and comes with ABSOLUTELY NO WARRANTY.You are welcome to redistribute it under certain conditions.Type 'license()' or 'licence()' for distribution details.R is a collaborative project with many contributors.Type 'contributors()' for more information and'citation()' on how to cite R or R packages in publications.Type 'demo()' for some demos, 'help()' for on-line help, or'help.start()' for an HTML browser interface to help.Type 'q()' to quit R.> library(foreign)> ex1.51 <- read.mtp("ex1-51.mtp")> summary(ex1.51)Length Class Modecontrol 26 -none- numericseeded 26 -none- numeric> str(ex1.51)List of 2$ control: num [1:26] 1203 830 372 346 321 ...$ seeded : num [1:26] 2746 1698 1656 978 703 ...> ex1.51 <- data.frame(ex1.51)> summary(ex1.51)control seededMin. : 1.00 Min. : 4.101st Qu.: 24.82 1st Qu.: 98.12Median : 44.20 Median : 221.60Mean : 164.59 Mean : 441.983rd Qu.: 159.20 3rd Qu.: 406.02Max. :1202.60 Max. :2745.60> q()