Shown here are the data for y and three predictors, x1, x2, and x3. A stepwise regression procedure has been done on these data; the results are also given. Comment on the outcome of the stepwise analysis in light of the data.

y x1 x2 x3 94 21 1 204 97 25 0 198 93 22 1 184 95 27 0 200 90 29 1 182 91 20 1 159 91 18 1 147 94 25 0 196 98 26 0 228 99 24 0 242 90 28 1 162 92 23 1 180 96 25 0 219 Step 1 2 3 Constant 74.81 82.18 87.89 X3 0.099 0.067 0.071 T-Value 6.90 3.65 5.22 P-Value 0.000 0.004 0.001 X2 -2.26 -2.71 T-Value -2.32 -3.71 P-Value 0.043 0.005 X1 -0.256 T-Value -3.08 P-Value 0.013 S 1.37 1.16 0.850 R-Sq 81.24 87.82 94.07 R-Sq(adj) 79.53 85.38 92.09