highly significantP = 0.000
The highly significant regression model for CoF (model F = 19.74, P = 0.000) confirms that frictional variability is driven by filler, load, distance, and emery paper.
The highly significant regression model for CoF (model F = 19.74, P = 0.000) confirms that frictional variability is driven by filler, load, distance, and emery paper.
The linear dominance within the investigated ranges is reinforced by quadratic effects such as filler 2 , which approach borderline significance ( P = 0.055, 1.57% contribution) but are still negligible overall.