Journal of Engineering and Applied Science

Table 4 One-way ANOVA results for shrinkage: effect of injection temperature

From: Analysis of variance of injection moulding process parameters and clay particles size effects on impact strength, shrinkage and warpage of polyethylene/kaolin clay composites

	Groups	Count	Sum		Average		Variance
< 75 μm	Melt 180	3	0.058		0.019		1.66E−05
	Melt 200	3	0.089		0.029		2.59E−05
	Melt 220	3	0.101		0.033		3.01E−06
75–106 μm	Melt 180	3	0.146		0.048		3.71E−05
	Melt 200	3	0.185		0.061		2.93E−05
	Melt 220	3	0.186		0.062		4.81E−05
106–150 μm	Melt 180	3	0.147		0.049		4.2E−05
	Melt 200	3	0.182		0.060		2.09E−05
	Melt 220	3	0.182		0.060		1.32E−05
	Source of variation	SS	df	MS	F	p-value	F crit
< 75 mm	Between groups	0.0003	2	1.65E−04	10.88	0.0101	5.143
	Within groups	0.0001	6	1.52E−05
	Total	0.0004	8
75–106 μm	Between groups	0.0003	2	0.00016	4.39	0.066	5.143
	Within groups	0.0002	6	3.81E−05
	Total	0.0005	8
106–150 μm	Between groups	0.0002	2	0.00013	5.39	0.045	5.143
	Within groups	0.0001	6	2.53E−05
	Total	0.0004	8

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