Table 5.
Variance analysis of the second−order polynomial model for the rebound rate of samples.
| Coefficient Source | Sum of Squares | Degree of Freedom | Variance | p−Value |
|---|---|---|---|---|
| model | 0.16 | 9 | 0.018 | 0.0027 |
| A− Forming temperature | 0.058 | 1 | 0.058 | 0.0007 |
| B− Forming time | 0.012 | 1 | 0.012 | 0.0327 |
| C−AC content | 0.013 | 1 | 0.013 | 0.0282 |
| AB | 0.024 | 1 | 0.024 | 0.0078 |
| AC | 0.0037 | 1 | 0.0037 | 0.1854 |
| BC | 0.0035 | 1 | 0.0035 | 0.1984 |
| A2 | 0.028 | 1 | 0.028 | 0.0051 |
| B2 | 0.0015 | 1 | 0.0015 | 0.3839 |
| C2 | 0.015 | 1 | 0.015 | 0.0220 |
| Residual error | 0.012 | 7 | 0.0017 | |
| LOF | 0.0098 | 3 | 0.0033 | 0.0632 |
| Error term | 0.0022 | 4 | 0.0057 | |
| Total variation | 0.17 | 16 |