Table 5.
ANOVA for tensile strength testing (quadratic model, DoF—degree of freedom).
| Source | Sum of Squares | DoF | Mean Square | F-Value | p-Value | Remark |
|---|---|---|---|---|---|---|
| Model | 23.56 | 9 | 2.62 | 21.49 | <0.0001 | Significant |
| A—Extrusion temperature | 1.20 | 1 | 1.20 | 9.84 | 0.0120 | Significant |
| B—Flow rate multiplier | 18.56 | 1 | 18.56 | 152.31 | <0.0001 | Significant |
| C—Layer thickness | 2.86 | 1 | 2.86 | 23.51 | 0.0009 | Significant |
| AB | 0.0015 | 1 | 0.0015 | 0.0119 | 0.9154 | |
| AC | 0.0064 | 1 | 0.0064 | 0.0524 | 0.8241 | |
| BC | 0.0058 | 1 | 0.0058 | 0.0477 | 0.8320 | |
| A² | 0.1682 | 1 | 0.1682 | 1.38 | 0.2701 | |
| B² | 0.6866 | 1 | 0.6866 | 5.63 | 0.0417 | Significant |
| C² | 0.0072 | 1 | 0.0072 | 0.0592 | 0.8132 | |
| Residual | 1.10 | 9 | 0.1219 | |||
| Lack of fit | 0.6840 | 5 | 0.1368 | 1.33 | 0.4038 | Not significant |
| Pure Error | 0.4127 | 4 | 0.1032 | |||
| Corrected Total | 24.66 | 18 |