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| Source | Sum of squares | Degree of freedom | Mean square | F-value | P-value | — |
|---|---|---|---|---|---|---|
| Mean | 12 540.05 | 1 | 12 540.05 | — | — | — |
| Linear | 1078.12 | 4 | 269.53 | 2.75 | 0.0540 | — |
| 2FI | 284.80 | 6 | 47.47 | 0.41 | 0.8645 | — |
| Quadratic | 1795.72 | 4 | 448.93 | 70.66 | <0.0001 | Suggested |
| Cubic | 18.99 | 8 | 2.37 | 0.17 | 0.9846 | Aliased |
| Residual | 57.25 | 4 | 14.31 | — | — | — |
| Total | 15 774.93 | 27 | 13 322.66 | — | — | — |
