Table 2. ANOVA of the Quadratic Model for the Polysaccharide Yield.
| source | sum of squares | degrees of freedom | mean square | F value | p-value Prob > F |
|---|---|---|---|---|---|
| model | 243.13 | 9 | 27.01 | 46.83 | 0.0003 |
| X1 | 5.92 | 1 | 5.92 | 10.26 | 0.0239 |
| X2 | 3.16 | 1 | 3.16 | 5.48 | 0.0663 |
| X3 | 68.97 | 1 | 68.97 | 119.57 | 0.0001 |
| X1X2 | 0.75 | 1 | 0.75 | 1.30 | 0.3064 |
| X1X3 | 1.97 | 1 | 1.97 | 3.42 | 0.1236 |
| X2X3 | 5.34 | 1 | 5.34 | 9.25 | 0.0287 |
| X12 | 3.07 | 1 | 3.07 | 5.33 | 0.0690 |
| X22 | 3.77 | 1 | 3.77 | 6.53 | 0.0509 |
| X32 | 155.52 | 1 | 155.52 | 269.60 | <0.0001 |
| residual | 2.88 | 5 | 0.58 | ||
| lack of fit | 2.34 | 3 | 0.78 | 2.89 | 0.2673 |
| pure error | 0.54 | 2 | 0.27 | ||
| total | 246.01 | 14 |