Level

Mean S/N ratio for case: w₁ = 0.2, w₂= 0.6 and w₃ = 0.2

A

Si

B

Cu

C

Sr

D

Ni

1

35.70

35.49

35.37

35.72

2

35.57

35.35

35.33

35.40

3

34.97

35.39

35.53

35.11