Table 4.

ANOVA results of regression models from mixture design for solvent optimization of DPPH

Source	DF	Seq SS	Adj SS	Adj MS	$F$ value	$p$ value
Regression	6	1.182	1.182	0.197	2.45	0.010
Linear	2	0.305	0.511	0.256	2.88	0.039
Quadratic	3	0.863	0.666	0.222	3.63	0.079
X1 × X2	1	0.054	0.028	0.028	2.21	0.056
X1 × X3	1	0.801	0.592	0.592	4.35	0.068
X2 × X3	1	0.007	0.015	0.015	1.12	0.066
Special cubic	1	0.013	0.013	0.013	2.10	0.042
X1 × X2 × X3	1	0.013	0.013	0.013	2.10	0.042
Residual error	3	0.410	0.408	0.136
Total	9	1.590