Optimization of Phenolic Compound Extraction from Chinese Moringa oleifera Leaves and Antioxidant Activities

Table 4

ANOVA of the predicted regression model for TP.

Source	Sum of squares	df	Mean square	F value	value	Significance
Model	0.22	14	0.015	10.27	<0.0001
X1	0.020	1	0.020	13.35	0.0026
X2	0.027	1	0.027	18.07	0.0008
X3	4.408E − 003	1	4.408E − 003	2.94	0.1084
X4	2.408E − 003	1	2.408E − 003	1.61	0.2256
X1X2	0.021	1	0.021	14.03	0.0022
X1X3	0.027	1	0.027	18.17	0.0008
X1X4	6.250E − 004	1	6.250E − 004	0.42	0.5288
X2X3	0.011	1	0.011	7.36	0.0168
X2X4	5.625E − 003	1	5.625E − 003	3.75	0.0731
X3X4	2.205E − 003	1	2.205E − 003	1.35	0.2645
	0.072	1	0.072	47.95	<0.0001
	0.022	1	0.022	14.44	0.0020
	0.015	1	0.015	9.87	0.0072
	0.028	1	0.028	18.43	0.0007
Residual	0.021	14	1.499E − 003
Lack of fit	0.017	10	1.730E − 003	1.88	0.2844
Pure effort	3.680E − 003	4	9.200E − 004
Cor. total	0.24	28
R^2 = 0.9113, adj. R^2 = 0.8226, adeq. precision = 11.632, and CV% = 1.65

No significant different (). Significantly different (). Highly significantly different (). Remarkably significantly different ().