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Kruskal–Wallis test for surface roughness (SR) parameter.
| Test Statistics a,b | ||||
|---|---|---|---|---|
| SR_ Filtek Z550 ST | SR_ Evetric ST | SR_ Filtek Z550 ML + ST | SR_ Evetric ML + ST | |
| Chi-Square | 4.808 | 15.840 | 2.347 | 4.107 |
| df | 2 | 2 | 2 | 2 |
| Asymp. Sig. | 0.090 | 0.000 | 0.309 | 0.128 |
a. Kruskal–Wallis test; b. grouping variable: grade SR.
