Table 7.

ANOVA for the quadratic experimental models for caffeine, trigonelline, and nicotinic acid estimated on the complete experimental data set.

		Caffeine				Trigonelline				Nicotinic Acid
Source	d.f.	Sum of Squares	Mean Square	F-ratio	Sig.	Sum of Squares	Mean Square	F-ratio	Sig.	Sum of Squares	Mean Square	F-ratio	Sig.
Regression	5	2.92657 × 104	5.85315 × 103	65.297	<0.01 ***	5.46235 × 103	1.09247× 103	76.80	<0.01 ***	0.3126	0.0625	28.92	0.00 ***
Residual SSE	7	6.27473 × 102	8.96391 × 101			9.95740 × 101	1.42248× 101			0.0151	0.0022
Lack of fit SSLOF	6	5.43480 × 102	9.05800 × 101	1.078	62.7	8.04716 × 101	1.34119× 101	0.702	72.2	0.0133	0.0022	1.235	59.7
Error SSPE	1	8.39938 × 101	8.39938 × 101			1.91024 × 101	1.91024× 101			0.0018	0.0018
Total SS	12	2.98932 × 104				5.56192 × 103				0.3277