Table 4.

ANOVA for the entire quadratic model of response (1) concentration of total pigment.

Source	Sum of squares	Mean square	F -value	p -value
Model	2440.89	271.21	59.88	<0.0001	Significant
A-potato wastes concentration	160.38	160.38	35.41	0.0006
B-fermentation period	30.38	30.38	6.71	0.0359
C-peptone concentration	1425.51	1425.51	314.75	<0.0001
AB	10.05	10.05	2.22	0.1800
AC	84.27	84.27	18.61	0.0035
BC	6.28	6.28	1.39	0.2776
A2	38.28	38.28	8.45	0.0227
B2	289.17	289.17	63.85	<0.0001
C2	380.57	380.57	84.03	<0.0001
Residual	31.70	4.53
Lack of fit	7.11	2.37	0.3857	0.7701	Not significant
Pure error	24.59	6.15
Cor. total	2472.59