[Retracted] Optimization of Reinforced Aluminium Scraps from the Automobile Bumpers with Nickel and Magnesium Oxide in Stir Casting

Table 6

Analysis of variance of hardness for ratios of SN.

Source	DF	Seq SS	Adj SS	Adj MS	F	value
(MPa)	2	0.05575	0.05575	0.02787	5.09	0.164
t (s)	2	6.04324	6.04324	3.02162	551.85	0.002
N (rpm)	2	3.46786	3.46786	1.73393	316.67	0.003
Residual error	2	0.01095	0.01095	0.00548
Total	8	9.57780