Table 8.

Analysis of variance (ANOVA) for the quadratic polynomial model fitted to enzyme residual activity, Y₂.

Source of variation	Degrees of Freedom	Sum of Squares	Mean square Deviation	Standard	Significance
Regression	5	0.583	0.117	0.342	0.000a
Residuals	31	0.282	0.009	0.095
Lack of fit (model error)	12	0.144	0.012	0.109	0.162b
Pure error (replicate error)	19	0.139	0.007	0.085
R2 / $R_{adj.}^2$c	0.674 / 0.621
Q2	0.50

^aSignificant at the level 95%.

^bNo lack of fit.

^cR² adjusted for degree of freedom.