Factor | Process parameters | Sum of squares | Degrees of freedom | Mean sum of squares | F-test |
A | Rotational speed | 8.821 | 2 | 4.41 | 17.68 |
B | Welding speed | 6.071 | 2 | 3.035 | 12.17 |
C | Axial load | 1.308 | 2 | 0.654 | 2.62 |
Error |
| 0.498 | 2 | 0.249 |
|
Total |
| 16.700 | 8 |
|
|