Table 2.

Analysis of variance for the regression model of TPC and DPPH.

	TPC			DPPH
Source	Coefficient Estimate	F-Value	p-Value	Coefficient Estimate	F-Value	p-Value
Model	35.25	87.37	<0.0001	69.15	23.84	0.0005
X1-Ethanol con.	−1.14	15.01	0.0082	4.59	12.75	0.0118
X2-Temperature	−2.29	60.71	0.0002	−4.44	11.93	0.0136
X3-Time	1.10	14.04	0.0095	7.55	34.53	0.0011
X1X2	0.0000	0.0000	1.0000	2.67	2.17	0.1914
X1X3	0.8250	3.95	0.0941	5.65	9.67	0.0209
X2X3	−1.72	17.26	0.0060	−3.65	4.03	0.0913
X12	−6.78	266.25	<0.0001	−14.31	62.04	0.0002
X22	−6.02	210.57	<0.0001	−12.41	46.66	0.0005
X32	−5.85	198.51	<0.0001	−10.09	30.82	0.0014
Lack of Fit	-	23.34	0.0140	-	24.00	0.0134
R2	0.9924			0.9728
Adjusted R2	0.9811			0.9320
C.V.%	3.20			7.16
Adeq Precision	24.71			13.37