Table 3.
ANOVA for response surface quadratic model
| Source | Sum of squares | df | Mean square | F value | Prob> F | |
|---|---|---|---|---|---|---|
| Model | 27307.53 | 9 | 3034.17 | 51.99 | 0.0002 | Significant |
| A (Temperature)°C | 939.61 | 1 | 939.61 | 16.10 | 0.0102 | Significant |
| B (Shaking speed) | 60.50 | 1 | 60.50 | 1.04 | 0.3553 | Not significant |
| C (pH) | 16137.06 | 1 | 16137.06 | 276.49 | < 0.0001 | Significant |
| AB | 1.00 | 1 | 1.00 | 0.0171 | 0.9010 | Not significant |
| AC | 406.02 | 1 | 406.02 | 6.96 | 0.0461 | Significant |
| BC | 1980.25 | 1 | 1980.25 | 33.93 | 0.0021 | Significant |
| A2 | 1986.63 | 1 | 1986.63 | 34.04 | 0.0021 | Significant |
| B2 | 1058.20 | 1 | 1058.20 | 18.13 | 0.0080 | Significant |
| C2 | 4332.36 | 1 | 4332.36 | 74.23 | 0.0003 | Significant |
| Residual | 291.82 | 5 | 58.36 | |||
| Lack offit | 250.13 | 3 | 83.38 | 0.2064 | Not significant | |
| Pure error | 41.69 | 2 | 20.84 | |||
| Cor total | 27599.35 | 14 |