Mycosynthesis of silver nanoparticles from endophytic Aspergillus flavipes AUMC 15772: ovat-statistical optimization, characterization and biological activities

Table 3 Regression statistical analyses of the Plackett–Burman experimental results

Variable	Coefficient	Standard error	Main effect	Main effect (%)	tStat	P-value	Lower 95.0%	Upper 95.0%
Intercept	2.7176	0.0810	–	–	33.5436	0.0008	2.3690	3.0662
x₁	0.1903	0.0810	− 1.36575	− 210.6826	2.3498	0.1432	− 0.1582	0.5389
x₂	− 0.1543	0.0810	1.23425	190.3972	− 1.9054	0.1970	− 0.5029	0.1942
x₃	0.3538	0.0810	0.70775	109.1785	4.3678	0.0486	0.0052	0.7024
x₄	0.6171	0.0810	0.38075	58.7350	7.6171	0.0168	0.2685	0.9657
x₅	− 0.6828	0.0810	− 0.30875	− 47.6282	− 8.4287	0.0137	− 1.0314	− 0.3342

Where t Student’s test, P corresponding level of significance, df degree of freedom, SS sum of squares, MS mean sum of squares, F Fisher’s function; and significance. F corresponding level of significance

ISSN: 1475-2859