Table 5.

Analysis of variance (ANOVA) results on part density.

Source	Sum of Squares	df	Mean Square	F-value	p-value	Dependence	Percentage Contribution
Model	0.3559	5	0.0712	19.79	<0.0001	significant	-
Part thickness (A)	0.2355	2	0.1177	32.74	<0.0001	-	56.46%
Gas injection pressure (B)	0.1023	1	0.1023	28.46	<0.0001	-	24.53%
AB	0.0181	2	0.0091	2.52	0.1100	-	4.34%
Residual	0.0611	17	0.0036	-	-	-	14.65%
Cor Total	0.4171	23	-	-	-		-