Table 8.

Analysis of data generated using PB design

Coded variable	Variable	Coefficient estimate	T-value	P-value	Significance
Intercept	Constant	3192.9	65.93	0.000	***
A	medium volume	-384.9	-7.85	0.001	***
B	initial pH	173.8	3.59	0.016	*
C	inoculum size	-81.8	-1.69	0.152
D	fermentation time	-14.9	-0.31	0.771
E	rotary speed	59.6	1.23	0.273
F	fermentation temperature	248.6	5.13	0.004	**

Note:

^*Significant at the P < 0.05 level

^**Significant at the P < 0.01 level

^*** Significant at the P < 0.001 level