Water Absorption Behavior of Teff (Eragrostis tef) Straw Fiber-Reinforced Epoxy Composite: RSM-Based Statistical Modeling and Kinetic Analysis

Table 4

The fit summary of different type of equations.

Source	Sequential value	Lack of fit value	Adjusted	Predicted
Linear	<0.0001	<0.0001	0.9639	0.9449
2FI	0.2716	<0.0001	0.9652	0.9414
Quadratic	<0.0001	0.0036	0.9996	0.9983 (suggested)
Cubic	0.0006	0.5228	1	0.9999 (aliased)