BMC Microbiology

Table 5 Analysis of variable for P-B design

From: Optimization of glutathione production in Saccharomyces cerevisiae HBSD-W08 using Plackett–Burman and central composite rotatable designs

Variable	Effect	Coefficients	Standard error	T value	P value
Glucose	0.3898	0.1949	0.0789	2.47	0.057
Peptone	0.8475	0.4238	0.0789	5.37	0.003
KH₂PO₄	1.2277	0.6138	0.0789	7.78	0.001
MgSO₄	−0.3084	−0.1524	0.0789	−1.95	0.108
(NH₄)₂SO₄	0.0989	0.0495	0.0789	0.63	0.558
Glutamate	−0.4907	− 0.2453	0.0789	−3.11	0.027
R-Sq		Predicted R-Sq		Adjusted R-Sq
95.62%		74.79%		90.37%

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