| Variable | Estimate | Std. Error | t-value | Pr (>|t|) |
| C | 14.05747 | 5.08231 | 2.766 | 0.007381 |
| X1 | 0.44238 | 0.15504 | 2.853 | 0.005798 |
| X2 | 0.33645 | 0.09170 | 3.669 | 0.000493 |
| X3 | −0.38935 | 0.16303 | −2.388 | 0.019846 |
| X4 | 0.1378 | 0.13132 | 1.050 | 0.297591 |
| X5 | −2.44699 | 3.57997 | −0.684 | 0.496706 |
| X6 | 0.17148 | 0.02944 | 5.825 | 1.93e−07 |