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

Table 5

Hardness response table with ranks.

Level	Response for SN ratio			Response for means
	P (MPa)	t (s)	N (rpm)	P (MPa)	t (s)	N (rpm)
1	34.19	33.26	35.03	51.26	46.10	56.66
2	34.25	34.31	34.29	52.10	52.10	52.10
3	34.38	35.26	33.51	52.94	58.10	47.54
Delta	0.19	2.01	1.52	1.68	12.00	9.12
Rank	3	1	2	3	1	2