Table 8 Analysis of variance (ANOVA) for the response surface of full quadratic model for optimization of two variables (A, pH; B, Temperature)
Source | Sum of Square | Degree of freedom | Mean Square | F-value | P-value |
|---|---|---|---|---|---|
A | 43.30 | 1 | 43.30 | 38.01 | 0.0021 |
B | 56.28 | 1 | 56.28 | 51.34 | 0.0001 |
AB | 5.65 | 1 | 5.65 | 5.16 | 0.0493 |
A2 | 3.45 | 1 | 3.45 | 3.15 | 0.1096 |
B2 | 84.01 | 1 | 84.01 | 76.64 | <0.0001 |
Lack of fit | 0.0125 | 3 | 0.00291 | 1.809 | 0.37651 |
Pure error | 0.041 | 2 | 0.096 | ||
Total | 192.75 | 10 |