Open Access
Table 6
Analysis of variance for regression model.
| Sources | Sum of squares | df | Mean square | F-value | P-value |
|---|---|---|---|---|---|
| Model | 119.34 | 9 | 13.26 | 43.88 | <0.0001 |
| x1 | 42.40 | 1 | 42.40 | 140.31 | <0.0001 |
| x2 | 12.61 | 1 | 12.61 | 41.74 | <0.0001 |
| x3 | 3.08 | 1 | 3.08 | 10.21 | 0.0096 |
| x1x2 | 0.0903 | 1 | 0.0903 | 0.2989 | 0.5966 |
| x1x3 | 3.60 | 1 | 3.60 | 11.93 | 0.0062 |
| x2x3 | 2.66 | 1 | 2.66 | 8.79 | 0.0142 |
| x12 | 37.87 | 1 | 37.87 | 125.33 | <0.0001 |
| x22 | 5.64 | 1 | 5.64 | 18.68 | <0.0001 |
| x32 | 19.92 | 1 | 19.92 | 65.91 | <0.0001 |
| Residual | 3.02 | 10 | 0.3022 | ||
| Lack of Fit | 2.18 | 5 | 0.4365 | 2.60 | 0.1589 |
| Pure Error | 0.8393 | 5 | 0.1679 | ||
| Cor Total | 122.37 | 19 |
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