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. 2020 Jun 1;10:8850. doi: 10.1038/s41598-020-65480-5

Table 5.

Analysis of Variance (ANOVA) for Phenol response surface.

Source Sum of Squares df Mean Square F-value p-value
Model 1298.75 9 144.31 5.25 <0.0001 significant
A-Catalyst dosage 5.25 1 5.25 0.1911 0.0413
B-Run Time 85.43 1 85.43 3.11 0.043
C-Air Flow rate L/min 315.28 1 315.28 11.48 0.0069
AB 240.57 1 240.57 8.76 0.0143
AC 554.24 1 554.24 20.18 0.0012
BC 94.29 1 94.29 3.43 0.0036
0.7725 1 0.7725 0.0281 0.0072
1.74 1 1.74 0.0633 0.0065
4.65 1 4.65 0.1693 0.0894
Residual 274.69 10 27.47
Lack of Fit 22.89 5 4.58 0.0909 0.9901 not significant
Pure Error 251.8 5 50.36
Cor Total 1573.44 19
R² 0.9854 Model Precision 9.374
Adjusted R² 0.9683 Std. Dev. 5.24
Predicted R² 0.7567 Mean 47.86 C.V.% 10.95