A Level

A Voltage

B Current

C Welding Speed

Total Average of S/N Ratio

Sum of

S/N ratio

Average of

S/N ratio

Sum of

S/N ratio

Average of

S/N ratio

Sum of

S/N ratio

Average of

S/N ratio

22.3259

1

66.3752

22.1251

71.5680

23.8560*

62.8534

20.9511

2

67.8510

22.6170٭

65.5968

21.8656

66.1080

22.0360

3

66.7072

22.2357

63.7686

21.2562

71.9720

23.9907٭