Table 7.

The values of regression coefficients and analysis of the model for ellagic acid yield.

Parameter	Coefficient Estimate	Standard Error	Sum of Squares	Degrees of Freedom	Mean Square	F-Value	p-Value Probability > F
Model			101.37	5	20.27	35.97	<0.0001
Intercept	11.68	0.25		1
X2	−1.18	0.27	11.16	1	11.16	19.81	0.0010
X3	3.07	0.27	75.40	1	75.40	133.78	<0.0001
X1 X2	−0.85	0.38	2.87	1	2.87	5.10	0.0453
X2 X3	0.87	0.38	2.99	1	2.99	5.31	0.0417
X22	−1.45	0.36	8.94	1	8.94	15.87	0.0021
Residual			6.20	11	0.56
Lack of fit			2.27	7	0.32	0.33	0.9042
Pure error			3.93	4	0.98
R2	0.9424		Adj R2	0.9162
C.V. %	6.82		Pred R2	0.8711
PRESS	13.86		Adeq Precision	21.613