ANN-based predictive modelling of the effect of abrasive water-jet parameters on the surface roughness of AZ31 Mg alloy

Open Access

Table 4

ANOVA for means: R_a.

Source	DF	Adj SS	Adj MS	F	P	% MS
SOD	2	1.65182	0.82591	3.56	0.219	40.2
Feed rate	2	0.02809	0.01404	0.06	0.943	0.7
No. of passes	2	1.96136	0.98068	4.23	0.191	47.8
Residual error	2	0.46402	0.23201			11.3

DF: degrees of freedom, Adj SS: adjusted sum of squares, Adj MS: adjusted mean squares, F: F-ratio or variance ratio, P: probability limit for null hypothesis to be true, % MS: percentage contribution of individual parameter.

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