[Retracted] Experimental Analysis and Optimization of Tribological Properties of Self-Lubricating Aluminum Hybrid Nanocomposites Using the Taguchi Approach

Table 7

ANOVA for the friction coefficient, using adjusted SS for tests.

Source	Degrees of freedom (DOF)	Sum of squares (SS)	Adjusted sum of squares (ASS)	Adjusted mean of squares (AMS)	F-value	value	Percentage of contribution
A	2	0.0037443	0.0037443	0.0018721	7.95	0.001	11.12
B	2	0.0012574	0.0012574	0.0006287	36.41	0.002	60.23
C	2	0.0022005	0.0022005	0.0011003	0.55	0.000	3.25
D	2	0.0000130	0.0000130	0.0000065	4.56	0.813	8.63
	4	0.0004846	0.0004846	0.0001211	2.01	0.064	6.98
	4	0.0001015	0.0001015	0.0000254	0.84	0.547	2.53
	4	0.0001650	0.0001650	0.0000413	1.37	0.349	4.03
Error	6	0.0001813	0.0001813	0.0000302			3.23
Total	26	0.0081476					100

S = 0.00549747 R-Sq = 97.77% R-Sq (adj) = 90.36%.