Application of Full Factorial Design in Optimization of Solvent-Free Microwave Extraction of Ginger Essential Oil

Table 3

Analysis of variance.

Source	Sum of squares	Degree of freedom (df)	Mean square	value	value prob. >	Remark
Model	0.17	7	0.024	97.83	<0.0001	Significant
A-extraction time	0.051	1	0.051	202.50	<0.0001
B-power	0.048	1	0.048	193.60	<0.0001
C-sample	0.026	1	0.026	102.40	<0.0001
AB	0.016	1	0.016	62.50	<0.0001
AC	0.013	1	0.013	52.90	<0.0001
BC	0.012	1	0.012	48.40	0.0001
ABC		1		22.50	0.0015
Pure error		8
Cor total	0.17	15