Table 2.

ANOVA for the effect of temperature, time and liquid to material ratio on inhibition zone of the extracts using the quadratic response surface model

Source	Sum of Squares	df	Mean square	F value	P value	Sig.
Model	30.23	9	3.36	43.50	< 0.0001	**
X 1	1.26	1	1.26	16.37	0.0049	**
X 2	0.70	1	0.70	9.09	0.0195	*
X 3	6.94	1	6.94	89.84	< 0.0001	**
X 1 X 2	2.64	1	2.64	34.20	0.0006	**
X 1 X 3	0.43	1	0.43	5.56	0.0506
X 2 X 3	0.16	1	0.16	2.07	0.1932
X 21	17.79	1	17.79	230.38	< 0.0001	**
X 22	0.01	1	0.01	0.07	0.7926
X 23	0.09	1	0.09	1.19	0.3106
Lack of fit	0.17	3	0.06	0.64	0.6299

* 0.01 < P < 0.05, ** P < 0.01