Optimization of Activated Carbons Prepared by H₃PO₄ and Steam Activation of Oil Palm Shells

Table 8

Statistical Estimations of coefficients: MB/AC-H₃PO₄ (𝑌₃).

Name	Coefficient	F inflation	Ecart-type	𝑡. exp.	Signif. %
𝑏0	295.750		1.702	173.80	<0.01***
𝑏1	−10.405	1.00	1.203	−8.65	0.240**
𝑏2	−6.668	1.00	1.203	−5.54	1.01*
𝑏11	84.876	1.04	1.345	63.09	<0.01***
𝑏22	124.127	1.04	1.345	92.26	<0.01***
𝑏12	7.750	1.00	1.702	4.55	1.82*

*** most significant effect, ** less significant effect, * not significant effect.