Table 3.

Analysis of variance-ANOVA for dye conc. (%) [PET–NH₂–Fe].

Source	DF	Seq SS	p%	Adj SS	Adj MS	F-value	p-value	Remarks
Model	8	2.66076	99.79	2.66076	0.332595	1,092.32	0.000	Significant
Linear	4	2.15717	80.91	2.15717	0.539293	1771.17	0.000	Significant
X1	2	1.24570	46.72	1.24570	0.622849	2045.59	0.000	Significant
X2	2	0.91147	34.19	0.91147	0.455737	1,496.75	0.000	Significant
2-Way interactions	4	0.50359	18.89	0.50359	0.125897	413.48	0.000	Significant
X1*X2	4	0.50359	18.89	0.50359	0.125897	413.48	0.000	Significant
Error	18	0.00548	0.21	0.00548	0.000304