Response Surface Optimization of Bioethanol Production from Sugarcane Molasses by Pichia veronae Strain HSC-22

Table 3

Analysis of variance of fitted quadratic regression model equation (4).

Source	SS	df	MS	-value	value	Remarks
Model	4.79E + 003	20	240	29.1	<0.0001	Very highly significant
	8.80	1	8.80	1.07	0.309	Nonsignificant
	90.4	1	90.4	11.0	0.00245	Significant
	71.2	1	71.2	8.67	0.00632	Significant
	115	1	115	13.9	0.000818	Highly significant
	624	1	624	75.9	<0.0001	Very highly significant
	376	1	376	45.8	<0.0001	Very highly significant
	8.60	1	8.60	1.05	0.315	Nonsignificant
	1.81	1	1.81	0.220	0.643	Nonsignificant
	0.569	1	0.569	0.0693	0.794	Nonsignificant
	246	1	246	30.0	<0.0001	Very highly significant
	1.91	1	1.91	0.233	0.633	Nonsignificant
	14.6	1	14.6	1.78	0.193	Nonsignificant
	4.98	1	4.98	0.606	0.443	Nonsignificant
	0.0276	1	0.0276	0.00336	0.954	Nonsignificant
	0.878	1	0.878	0.107	0.746	Nonsignificant
	33.3	1	33.3	4.06	0.0534	Possibly significant
	12.2	1	12.2	1.49	0.232	Nonsignificant
	3.04	1	3.04	0.370	0.548	Nonsignificant
	4.91	1	4.91	0.598	0.446	Nonsignificant
	50.3	1	50.3	6.12	0.0195	Possibly significant
Residual	238	29	8.22
Pure error	2.13	7	0.304
Corrected total	5.03E + 003	49

SS: sum of squares; df: degree of freedom; MS: mean square.