Optimized Conditions for Flavonoid Extraction from Pomelo Peel Byproducts under Enzyme- and Ultrasound-Assisted Extraction Using Response Surface Methodology

Table 3

Summary of fitting model.

Source	Sequential p value	Lack-of-fit  value	Adjusted R^2	Predicted R^2
Linear	0.5882	0.0027	−0.0420	−0.2209
2FI	0.7322	0.0020	−0.1602	−0.6634
Quadratic	<0.0001	0.5260	0.9532	0.8924
Cubic	0.3542	0.6185	0.9617	0.7379