Table 4.
ANOVA for the response surface quadratic model

Model parameter	Prebiotic sugar
	Regression coefficient	p value
	Model		0.0057
Intercept	–2086.2775	0.1242
Linear
X1	–39.552000	0.0203
X2	27.593000	0.0908
X3	69.558000	0.0106
Quadratic
X12	–1.864900	0.0090
X22	0.676500	0.0393
X32	–0.139725	0.3192
Interaction
X1X2	0.462500	0.1274
X1X3	–0.256250	0.0968
X2X3	–0.639225	0.0017
Lack of fit		0.1607
R2		0.9130
Adjusted R2		0.8012