Table 6.

Model coefficients [centered and scaled (SC)], their standard error (Std. Err.), p-value and confidence interval at 95% (CI) for the enzyme residual activity model.

Yield	Coeff. SC	Std. Err.	p-value	CI 95%(±)
Constant	−1.48	0.029	2.49 × 10−28	0.060
x1	−0.090	0.020	1.73 × 10−4	0.043
x2	−0.032	0.022	0.158	0.046
x3	−0.039	0.022	0.090	0.046
x1*x1	0.035	0.039	0.377	0.080
x2*x2	−0.011	0.043	0.790	0.088
x3*x3	−0.040	0.042	0.343	0.086
x1*x2	0.059	0.025	0.025	0.051
x1*x3	0.123	0.024	2.67 × 10−5	0.050
x2*x3	−0.027	0.025	0.284	0.051

Significant p-values (< 0.05) are identified in bold.