| Term | Coef | SE Coef | T | P |
| Constant | −2.31108 | 0.661381 | −3.494 | 0.001 |
| X1 | 0.97126 | 0.008847 | 109.779 | 0.000 |
| X2 | 1.09866 | 0.024489 | 44.864 | 0.000 |
| X3 | 1.04342 | 0.032242 | 32.132 | 0.000 |
| X4 | 0.99925 | 0.011376 | 87.842 | 0.000 |