Table 6: ANOVA and R-squared for the selected factorial model.

SourceSum of squaresMeanFp-value
dfSquareValueProb>F

Model142.41528.4823.240.0003Significant
A- Methanol10.85110.858.850.0207
B- number14.31114.3111.680.0112
AB0.5310.530.430.5321
A284.08184.0868.59<0.0001
B247.07147.0738.400.0004
Residual8.5871.23
Lack of Fit0.8430.280.150.9275 Not Significant
Pure Error7.7441.93
Cor Total150.9912
Std. Dev.1.11
Mean31.52
C.V.%3.51
PRESS18.09
R-Squared0.9432
Adj R-Squared0.9026a
Pred R-Squared0.8802
Adeq Precisior11.890