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Table 5
Final ANOVA for fatigue strength.
| Source | DF | Sum of squares | Mean squares | F-value | P-value | Decision |
|---|---|---|---|---|---|---|
| Model | 11 | 65.8964 | 5.9906 | 40.02 | 0.000 | Statistically significant |
| A | 1 | 3.0261 | 3.0261 | 20.22 | 0.000 | Statistically significant |
| B | 1 | 13.3056 | 13.3056 | 88.89 | 0.000 | Statistically significant |
| C | 1 | 5.1745 | 5.1745 | 34.57 | 0.000 | Statistically significant |
| D | 1 | 0.4508 | 0.4508 | 3.01 | 0.101 | Negligibly small |
| B*B | 1 | 3.3117 | 3.3117 | 22.13 | 0.000 | Statistically significant |
| C*C | 1 | 25.4646 | 25.4646 | 170.12 | 0.000 | Statistically significant |
| A*B | 1 | 2.3661 | 2.3661 | 15.81 | 0.001 | Statistically significant |
| A*C | 1 | 4.6010 | 4.6010 | 30.74 | 0.000 | Statistically significant |
| B*C | 1 | 0.7140 | 0.7140 | 4.77 | 0.043 | Statistically significant |
| B*D | 1 | 0.8100 | 0.8100 | 5.41 | 0.033 | Statistically significant |
| C*D | 1 | 1.3924 | 1.3924 | 9.30 | 0.007 | Statistically significant |
| Error | 17 | 2.5446 | 0.1497 | Negligibly small | ||
| Lack-of-Fit | 13 | 2.0769 | 0.1598 | 1.37 | 0.414 | Statistically significant |
| Pure Error | 4 | 0.4677 | 0.1169 | |||
| Total | 28 | 68.4410 |
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