Table 2.
Results of two-way ANOVA for Ra and Rz parameters
| Variable | Source | Sum of squares | df | Mean square | F | P |
|---|---|---|---|---|---|---|
| Ra | Corrected model | 7.127 | 11 | 0.0648 | 11.665 | 0.000 |
| Intercept | 8.969 | 1 | 8.969 | 161.492 | 0.000 | |
| Coloring technique (A) | 0.941 | 2 | 0.471 | 8.473 | 0.001 | |
| Surface treatment method (B) | 5.473 | 3 | 1.824 | 32.846 | 0.000 | |
| Interactions AxB | 0.713 | 6 | 0.119 | 2.139 | 0.049 | |
| Error | 3.332 | 60 | 0.056 | |||
| Total | 19.428 | 72 | ||||
| Rz | Corrected model | 183.008 | 11 | 16.637 | 49.424 | 0.000 |
| Intercept | 197.647 | 1 | 197.647 | 587.153 | 0.000 | |
| Coloring technique (A) | 9.372 | 2 | 4.686 | 13.921 | 0.000 | |
| Surface treatment method (B) | 163.656 | 3 | 54.552 | 162.059 | 0.000 | |
| Interactions AxB | 9.981 | 6 | 1.663 | 4.942 | 0.000 | |
| Error | 20.197 | 60 | 337 | |||
| Total | 400.853 | 72 |