Table 3. ANOVA for Response Surface Reduced Quadratic Model.

Term	Coefficient	SE Coefficient	T	P Value
Constant	111.464	7.61163	14.644	< 0.001
pH	-6.328	2.03878	-3.104	0.027
W	30.633	8.15404	3.757	0.013
C	-0.094	0.64340	-0.147	0.889
pH × pH	0.278	0.15025	1.849	0.124
W × W	-25.200	5.40913	-4.659	0.006
C × C	-0.281	0.03756	-7.469	0.001
pH × W	-1.733	0.86615	-2.001	0.102
pH × C	0.467	0.07218	6.465	0.001
W × C	1.867	0.43308	4.310	0.008