| Term | Coefficient | T | P |
| Constant | −15,578.6 | −11.20 | 0.000 |
| X1 | 40.2 | 11.18 | 0.000 |
| X2 | 1608.3 | 6.28 | 0.002 |
| X3 | 21.7 | 2.83 | 0.037 |
| X12 | 0 | −10.79 | 0.000 |
| X22 | −187.7 | −7.14 | 0.001 |
| X32 | -0.2 | −5.24 | 0.003 |
| X1X2 | −0.3 | −1.28 | 0.258 |
| X1X3 | 0 | 0.013 | 0.990 |
| X2X3 | 0.3 | 0.321 | 0.761 |