TABLE 3.

Predicted regression model of the relationship between response variables and independent variables (X1, X2, and X3) and analysis of variance for the fitted quadratic polynomial model of extraction.

Source	SS			DF			MS			F‐value			p‐Value
	Yield	AA	TPC	Yield	AA	TPC	Yield	AA	TPC	Yield	AA	TPC	Yield	AA	TPC
Model	167.77	453.57	9341.38	9	9	9	18.64	50.40	1037.93	40.19	47.37	50.38	<.0001	<.0001	<.0001
X1	110.11	315.76	6062.66	1	1	1	110.11	315.76	6062.66	237.38	296.78	294.29	<.0001	<.0001	<.0001
X2	15.32	23.43	1465.84	1	1	1	15.32	23.43	1465.84	33.02	22.02	71.15	.0007	.0022	<.0001
X3	6.90	4.05	1.08	1	1	1	6.90	4.05	1.08	14.88	3.80	0.0524	.0062	.0921	.8254
X1X2	8.50	17.89	604.42	1	1	1	8.50	17.89	604.42	18.32	16.82	29.34	.0037	.0046	.0010
X1X3	1.16	0.0036	190.99	1	1	1	1.16	0.0036	190.99	2.49	0.0034	9.27	.1585	.9552	.0187
X2X3	0.1681	35.34	143.28	1	1	1	0.1681	35.34	143.28	0.3624	33.22	6.96	.5662	.0007	.0336
X1 2	14.98	21.65	165.46	1	1	1	14.98	21.65	165.46	32.29	20.35	8.03	.0007	.0028	.0253
X2 2	6.56	32.31	634.81	1	1	1	6.56	32.31	634.81	14.15	30.37	30.81	.0071	.0009	.0009
X3 2	4.31	0.0205	15.22	1	1	1	4.31	0.0205	15.22	9.29	0.0193	0.7388	.0186	.8936	.4185
Residual	3.25	7.45	14.21	7	7	7	0.4639	1.06	20.60
Lack of fit	0.2102	0.6497	16.14	3	3	3	0.0701	0.2166	5.38	0.0923	0.1274	0.1680	.9604	.9390	.9127
Pure error	3.04	6.80	128.07	4	4	4	0.7592	1.70	32.02
Cor total	171.02	461.02	9485.59	16	16	16

Abbreviations: AA, antioxidant activity; DF, Degree of freedom; MS, Mean square; SS, Sum of squares; TPC, total phenolic content.