Table 2.

Table of ANOVA for the experimental variables as a linear, quadratic and interaction terms of each response variable and corresponding coefficients for the predictive models.

Source	D4,3 (µm)		Delay time (min)		CI (%)
	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value
Lack of fit		0.114		0.514		0.427
$R^2$	0.997		0.995		0.932
Adj-$R^2$	0.994		0.990		0.874
Linear
$b_1$	−0.160	<0.0001*	74.399	<0.0001*	−0.227	0.2291
$b_2$	−0.237	<0.0001*	200.821	<0.0001*	−1.340	0.0002*
Quadratic
$b_{11}$	0.088	<0.0001*	10.063	0.228	−0.2665	0.2102
$b_{22}$	0.123	0.00014*	27.818	0.0099*	0.64101	0.0149*
Interaction
$b_{12}$	0.137	0.00014*	78	0.00017*	−0.309	0.24541

$b_i$: the estimated linear coefficient of the quadratic polynomial equations. $b_{\mathit{ii}}$: the estimated quadratic coefficient of the quadratic polynomial equations $b_{\mathit{ij}}$: the estimated interactive coefficient of the quadratic polynomial equations. (1): IEC-F1 content; (2): total concentration of gum. * stands for a significant value.