2.163 Look at the residuals . Refer to the previous exercise . 7 6 5 o 4 o E 3 :9 2 g 1 O 0 -l '2 00 oo 0 O .3 O O 0 2 4 6 8 10 12 14 16 Years of employment Figure 2.35 is a plot of the residuals versus year . RAISES (a) Interpret the residual plot. Ans : the relation between the residual and years of employment is very 18 poor . 20