Table 3 Analysis of the variance for photo catalytic degradation of o -cresol parameters
Source | Sum of squares | Degree of freedom | Mean square | F Value | Prob > F |
|---|---|---|---|---|---|
Model | 12227.40 | 14 | 873.39 | 143.12 | < 0.0001 |
X1 | 3658.07 | 1 | 3658.07 | 599.43 | < 0.0001 |
X 2 | 184.26 | 1 | 184.26 | 30.19 | < 0.0001 |
X3 | 497.77 | 1 | 497.77 | 81.57 | < 0.0001 |
X4 | 5701.08 | 1 | 5701.08 | 934.20 | < 0.0001 |
X12 | 14.25 | 1 | 14.25 | 2.34 | 0.1473 |
X22 | 10.40 | 1 | 10.40 | 1.70 | 0.2114 |
X32 | 0.53 | 1 | 0.53 | 0.09 | 0.7732 |
X42 | 271.43 | 1 | 271.43 | 44.48 | < 0.0001 |
X1X2 | 43.89 | 1 | 43.89 | 7.19 | 0.0171 |
X1 X3 | 0.076 | 1 | 0.076 | 0.01 | 0.9128 |
X1 X4 | 9.98 | 1 | 9.98 | 1.63 | 0.2205 |
X2 X3 | 491.79 | 1 | 491.79 | 80.59 | < 0.0001 |
X2 X4 | 1040.58 | 1 | 1040.58 | 170.51 | < 0.0001 |
X3 X4 | 182.31 | 1 | 182.31 | 29.87 | < 0.0001 |
Residual | 91.54 | 15 | 6.10 | - | |
Lack of Fit | 70.91 | 10 | 7.09 | 1.72 | - |
Pure Error | 20.63 | 5 | 4.13 | - | - |
Corrected Total | 12318.93 | 29 | - | - | - |
R-Squared | 0.9926 | Standard Deviation | 2.47 | ||
Adjusted R2 | 0.9856 | Coefficient of variation % | 4.90 | ||
Adequate Precision | 47.067 | PRESS | 438.15 | ||