| Source | DF | Seq SS | Adj SS | ADJ MS | F | P |
| Regression | 4 | 5116.61 | 5116.61 | 1279.15 | 5112.00 | 0.00010 |
| X1 | 1 | 3176.56 | 3176.04 | 3176.04 | 1269.80 | 0.0110 |
| X2 | 1 | 166.07 | 364.36 | 364.36 | 1456.10 | 0.0010 |
| X3 | 1 | 82.48 | 86.30 | 86.30 | 344.90 | 0.0120 |
| X4 | 1 | 1691.5 | 1691.50 | 1691.50 | 6759.90 | 0.0010 |
| Error | 76 | 19.02 | 19.020 | 0.250 | ||
| Total | 80 | 5135.63 |