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D’Agostino and Pearson omnibus normality test.
| Test used | Control | Polished | Glazed |
|---|---|---|---|
| K2 | 1.938 | 1.140 | 2.375 |
| p-value | 0.3795 | 0.5655 | 0.3050 |
| Passed normality test (alpha=0.05) | Yes | Yes | Yes |
| p-value summary | Ns | Ns | Ns |
Ns – non-significant, K2 – D’Agostinos test for normality
