l. The generated data set in this question is taken front Mantel {l 9TB]. The data are given in Table 13 and can be found on the book web site in the file Mantellat. Interest centers on using variable selection to choose a subset of the predictors to model Y. The data were generated such that the full model 1i\":,E3,E,+JB]X.+_32X3 +3X3+e {'13} is a valid model for the data. Output from R associated with different variable selection procedures based on model {13} appears below.