Table 3.

A statistical analysis of the Plackett-Burman design shows coefficient values, effect, t- and P-values for each variable on the xylanase study

	Coefficients	Standard error	t-Stat	p-value	Confidence level (%)
Intercept	119.5084119	6.889719517	17.3459038	0.000417549
Ricinus communis	−14.58268826	0.296461368	−49.18916874	1.85019E−05	100
Corn steep	10.14870896	1.157487177	8.767880251	0.003124743	99.688
KH2PO4	−2.632637626	0.462994871	−5.686105379	0.010781161	98.922
Time	3.521502946	0.154331624	22.81776646	0.000184356	99.9816
Inoculum size	5.949054293	0.462994871	12.8490717	0.001017339	99.899
Moistening agent	3.718916414	0.092598974	40.16152929	3.39681E−05	100
Glucose	−22.14766313	0.997321474	−22.20714555	0.000199909	99.9801
The model’s summary
Multiple R			0.99956197
R2			0.99912412
Adjusted R2			0.99708041
Standard error			1.30954725