The application of Rumex abyssinicus based activated carbon for Brilliant Blue Reactive dye adsorption from aqueous solution

Table 8 Fit summary and Models’ lack of fit

Source	Sequential p-value	Lack of fit p-value	Adjusted R²	Predicted R²	Adeq. precision
Linear	< 0.0075	0.0003	0.3223	0.2024
2FI	0.6072	0.0002	0.2816	0.4247
Quadratic	< 0.0001	0.2477	0.9608	0.9003	401.4	Suggested
Cubic	0.2477	–	0.9799			Aliased

Source	Sum of squares	Df	Mean square	F-value	P-value
Linear	2874.01	20	143.70	41.83	0.0003
2FI	2312.15	14	165.15	48.07	0.0002
Quadratic	65.34	10	6.53	1.90	0.2477	Suggested
Cubic	0.000	0				Aliased
Pure error	17.18	5	3.44

ISSN: 2661-801X