Table 3 Coefficient of prediction models and ANOVA evaluation for each response variable

Source	II (%)		NSI (%)		WAC (%)		Hardness (g)		Springiness (%)	Cohesiveness (%)		Chewiness (g)		Cutting strength (g/cm 2)
	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value	p-value	Coefficient	p-value	Coefficient	p-value	Coefficient	p-value
	estimate	Prob> F	estimate	Prob>F	estimate	Prob>F	estimate	Prob>F	Prob > F	estimate	Prob>F	estimate	Prob>F	estimate	Prob>F
	Model	1301.25	0.0006	1862.93	<0.0001	-223.23	0.0011	16300.15	0.0149	0.2105	-32.01	0.0003	101800.74	0.0003	-14906.73	0.0066
	M	94.86	0.0004	-73.66	<0.0001	2.5	0.0427	-102.14	0.0247	0.6445	0.52	0.0106	-74.12	0.0018	619.89	0.0088
B	-50.21	0.8125			2.53	0.0007	-61.00	0.0100	0.2543	0.46	0.0002	-1346.18	0.0024	8.77	0.0431
S			-1.1	0.0496			-1.03	0.7972	0.1785	0.04	0.0308			-10.08	0.0495
MB									0.2282
MS			0.02	0.0465					0.3067
BS									0.7021
M 2	-0.99	0.0036	0.74	<0.0001					0.2338					-6.45	0.0082
B 2	0.18	0.0201							0.0858			4.68	0.0047
S 2									0.0951					0.04	0.0372
Lack of Fit	0.118			0.4875		0.6273		0.3462	0.8786		0.8083		0.0643		0.519

M=Moisture content; B=Barrel temperature; S=Screw speed; II=Integrity index; NSI=Nitrogen solubility index; WAC=Water absorption capacity; Nonsignificant factors (p>0.05) were removed.