Application of Response Surface Methodology and Central Composite Inscribed Design for Modeling and Optimization of Marble Surface Quality

Table 4

ANOVA results for roughness.

	Source	df	SS	MS	-ratio	value
Adara	Model	9			32.36	<0.0001
	Residual	10
	Total	19
	= 0.966	= 0.936
Emperador	Model	9			25.11	<0.0001
	Residual	10
	Total	19
	= 0.957	= 0.919
Crema Nera	Model	9			23.40	<0.0001
	Residual	10
	Total	19
	= 0.954	= 0.913
Sand Wave	Model	9			30.52	<0.0001
	Residual	10
	Total	19
	= 0.964	= 0.933

df: degrees of freedom, SS: sum of squares, and MS: mean square.