Table 4.

The least–square fit and parameters (significant of regression coefficient) (Fermentation condition).

Model	Unstandardized Coefficients		Standardized Coefficients	t	Sig.	95.0 % Confidence Interval for B
	B	Std. Error	Beta			Lower Bound	Upper Bound
1 (Constant)	45.460	0.439		103.475	<0.001	44.421	46.499
X1 (Temp)	−1.465	0.347	−0.126	−4.218	0.004	−2.286	−0.644
X2 (Time)	2.453	0.347	0.210	7.061	<0.001	1.631	3.274
X3 (immobilized cell)	0.663	0.347	0.057	1.907	0.098	−0.159	1.484
X12	−13.049	0.479	−0.813	−27.256	<0.001	−14.181	−11.917
X22	−6.809	0.479	−0.424	−14.222	<0.001	−7.941	−5.677
X32	−2.569	0.479	−0.160	−5.366	0.001	−3.701	−1.437
X1X2	0.532	0.491	0.032	1.084	0.314	−0.629	1.694
X1X3	0.392	0.491	0.024	0.799	0.451	−0.769	1.554
X2X3	0.627	0.491	0.038	1.278	0.242	−0.534	1.789

Dependent Variables: 1,3-PDO.