Table 2.

Analysis of variance (ANOVA) for the fitted quadratic polynomial model for MtEst45 activity.

Source	D.F.	S.S.	M.S.	F-value	P-value*
Model	5	5.79	1.16	57.04	<0.0001
X1	1	0.60	0.60	29.63	0.0010
X2	1	0.48	0048	23.39	0.0019
X1X2	1	0.22	0.22	10.83	0.0133
$X_1^2$	1	4.15	4.15	204.22	<0.001
$X_2^2$	1	0.72	0.72	35.61	0.006
Lack of fit	3	0.14	0.45	31.37	0.0031
Error	4	0.005797	0.00449	-	-
Total	12	5.94	-	-	-

R², 0.9760; D.F., refers to degrees of freedom; S.S., refers to sum of sequences; M.S. refers to mean square.

^*P-value less than 0.05 indicates the model terms are significant.