Table 4.

Analysis of variance for the responses Y₁ and Y₂ after fitting by the quadratic model

Quadratic model	F	P	R2	Pred R2	Adj R2	AP	SD	C.V.%
Response (Y1)	60.79	<0.0001	0.9775	0.8570	0.9614	18.437	6.28	6.49
Response (Y2)	147.45	<0.0001	0.9906	0.9455	0.9839	27.404	0.18	3.89

Notes: R² is relevant index which reflect a fitting degree; Pred R² (predicted R²) and Adj R² (adjusted R²) are reasonably agree with each other represent a good model fitting; AP is “Adeq precision”, which measures the singal to noise ratio.

Abbreviations: AP, Adeq precision; C.V.%, coefficient of variation; SD, standard deviation.