| Variable | Coefficient | Standard Error | T-Test Values | Probability |
| C | 46.82036 | 6.931485 | 6.75 | 0.000 |
| STA | 0.1013295 | 0.1516894 | 0.67 | 0.507 |
| IGR | 1.707277 | 0.0526464 | 32.43 | 0.000 |