Table 4.
Analysis of variance ANOVA between the fifteen means of the T1-T15 and T16-T30 tests.
| Technological effect | Source of variation (test numbers) | Machining period t | p-value | Statistical significance | Tests with significantly different means |
|---|---|---|---|---|---|
| linear material removal Δh | T1-T15 | ≤ 60 min | 0,15065 | no | - |
| roughness parameter Ra | 0,00557* | yes | T4 and T11 | ||
| waviness parameter Wa | 0,3555 | no | - | ||
| linear material removal Δh | T16-T30 | > 60 min | 0,02755* | yes | T16 and T27 |
| roughness parameter Ra | 0,00799* | yes | T16 and T26; T16 and T30 | ||
| waviness parameter Wa | 0,1220 | no | - |