Table 2.

Analysis of variance for response surface quadratic model.

α-amylase
Source	Sum of squares	Degrees of freedom	Mean of square	F value	P value
Model	3992.58	9	443.62	61.63	<0.0001 (Significant)
Residual	71.98	10	7.20
Lack of fit	53.89	5	10.78	2.98	0.1280 (not significant)
Pure Error	18.08	5	3.62
Total	4064.55	19
R2	0.982
α-glucosidase
Source	Sum of squares	Degrees of freedom	Mean of square	F value	P value
Model	823.77	9	91.53	25.63	<0.0001 (Significant)
Residual	35.71	10	3.57
Lack of fit	28.17	5	5.63	3.74	0.0870 (not significant)
Pure Error	7.53	5	1.51
Total	859.48	19
R2	0.958
Lipase
Source	Sum of squares	Degrees of freedom	Mean of square	F value	P value
Model	212.27	9	23.59	10.45	0.0005 (Significant)
Residual	22.57	10	2.26
Lack of fit	16.80	5	3.36	2.91	0.1331 (not significant)
Pure Error	5.77	5	1.15
Total	234.84	19
R2	0.903
DPPH
Source	Sum of squares	Degrees of freedom	Mean of square	F value	P value
Model	370.48	9	41.16	20.14	<0.0001 (Significant)
Residual	20.44	10	2.04
Lack of fit	13.43	5	2.69	1.92	0.2463 (not significant)
Pure Error	7.01	5	1.40
Total	390.92	19
R2	0.947
ABTS
Source	Sum of squares	Degrees of freedom	Mean of square	F value	P value
Model	1157.58	9	128.62	13.49	0.0002 (Significant)
Residual	95.35	10	9.54
Lack of fit	76.70	5	15.34	4.11	0.0734 (not significant)
Pure Error	18.65	5	3.73
Total	1252.93	19
R2	0.923