Table 2. Analysis of variance (ANOVA) of the response variables.
| Source | Sum of squares | Degree of freedom | Mean square | F-value | p-value |
|---|---|---|---|---|---|
| Viscosity | |||||
| Model | 1.137E+006 | 9 | 1.263E+005 | 61.12 | <0.0001 |
| Residual | 20668.81 | 10 | 2066.88 | ||
| Lack of fit | 20668.81 | 5 | 4133.76 | ||
| Pure error | 0.000 | 5 | 0.000 | ||
| Total | 1.158E+006 | 19 | |||
| R2=0.9821 | |||||
| pH | |||||
| Model | 0.21 | 13 | 0.016 | 11.96 | <0.0030 |
| Residual | 8.250E-003 | 6 | 1.375E-003 | ||
| Lack of fit | 8.250E-003 | 1 | 482.55 | 8.250E-003 | |
| Pure error | 0.000 | 5 | 0.000 | ||
| Total | 0.22 | 19 | |||
| R2=0.9628 | |||||
| Sedimentation | |||||
| Model | 0.31 | 13 | 0.024 | 10.31 | 0.0045 |
| Residual | 0.014 | 6 | 2.324E-003 | ||
| Lack of fit | 0.014 | 1 | 0.014 | ||
| Pure error | 0.000 | 5 | 0.000 | ||
| Total | 0.33 | 19 | |||
| R2=0.9571 | |||||
| Total solids | |||||
| Model | 28.42 | 9 | 3.16 | 10.39 | 0.0005 |
| Residual | 3.04 | 10 | 0.30 | ||
| Lack of fit | 3.04 | 5 | 0.61 | ||
| Pure error | 0.000 | 5 | 0.000 | ||
| Total | 31.45 | 19 | |||
| R2=0.9034 | |||||
| Overall acceptability | |||||
| Model | 0.49 | 13 | 0.038 | 7.05 | 0.0124 |
| Residual | 0.032 | 6 | 5.351E-003 | ||
| Lack of fit | 0.032 | 1 | 0.032 | ||
| Pure error | 0.000 | 5 | 0.000 | ||
| Total | 0.52 | 19 | |||
| R2=0.9385 |