Table 5.

Effect estimates for xylanase production from the results of PBD.

Unstandardized beta	Coefficient std. error		Standardized coefficient beta	t-value
Model	48.49	9.57		5.66
Induction temperature (X1)	0.28	0.13	0.36	2.25
OD600 nm (X2)	− 33.37	14.25	− 0.40	− 2.34
Post-induction time (X3)	− 3.74	1.45	0.46	− 2.58
[Yeast extract] (X4)	− 4.93	3.24	− 0.28	− 1.52
[Tryptone] (X5)	− 2.35	2.84	− 0.14	− 0.83
[IPTG] (X6)	− 0.98	0.27	− 0.60	− 3.67