Table 2.

Analysis of variance (ANOVA) testing the fitness of the regression equation.

Source	Sum of Squares	Df	Mean Square	F-Value	p-Value
Model	17.03	9	1.89	133.87	<0.0001
X1	0.34	1	0.34	24.07	0.0017
X2	0.22	1	0.22	15.40	0.0057
X3	0.78	1	0.78	54.81	0.0001
X1X2	0.19	1	0.19	13.38	0.0081
X1X3	1.77	1	1.77	125.11	<0.0001
X2X3	2.09	1	2.09	147.68	<0.0001
X12	0.63	1	0.63	44.71	0.0003
X22	2.87	1	2.87	202.68	<0.0001
X32	7.20	1	7.20	509.09	<0.0001
Residual	0.099	7	0.014
Lack of fit	0.062	3	0.021	2.20	0.2312
Pure error	0.037	4	9.350 × 10−3
Cor total	17.31	16
R2	0.9942
Adjusted R2	0.9868
CV %	1.68