Section 6.1 used lm() to analyze the allbacks data that are presented in Figure 6.1. Repeat the analysis using (1) the function rlm() in the MASS package, and (2) the function lqs() in the MASS...

Section 6.1 used lm() to analyze the allbacks data that are presented in Figure 6.1. Repeat the analysis using (1) the function rlm() in the MASS package, and (2) the function lqs() in the MASS package. Compare the two sets of results with the results in Section 6.1.