Modification of Medium Composition for Enhancing the Production of Antifungal Activity from Xenorhabdus stockiae PB09 by Using Response Surface Methodology

Table 7

Analysis of variance (ANOVA) for the quadratic model.

Source	SS	DF	MS	F-value	value
Model	1155.73	9	128.41	16.93	<0.0001
X1	100.23	1	100.23	13.21	0.0046
X2	297.38	1	297.38	39.20	<0.0001
X3	98.62	1	98.62	13.00	0.0048
X1X2	40.64	1	40.64	5.36	0.0432
X1X3	3.04	1	3.04	0.40	0.5410
X2X3	0.15	1	0.15	0.020	0.8915
X1^2	265.10	1	265.10	34.95	0.0001
X2^2	275.69	1	275.69	36.34	0.0001
X3^2	195.82	1	195.82	25.81	0.0005
Residual	75.86	10	7.59
Lack of fit	46.41	5	9.28	1.58	0.3149
Pure error	29.45	5	5.89
Total	1231.59	19

R² = 0.9384; significant at value less than 0.05.