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Table 5.
Statistical comparison of binary groups.
| Test | Bass-oriented (n = 11) | Treble-oriented (n = 7) | Statistic | p-value | Effect size* |
|---|---|---|---|---|---|
| Mann–Whitney U (frequency) | 246.96–277.12 Hz | 293.6–329.6 Hz | U = 4.0 | 0.0028 | r = 0.82 |
| ANOVA (spectral energy) | 0.78 ± 0.05 a.u.** | 1.12 ± 0.07 a.u. | F = 9.81 | 0.006 | η2 = 0.62 |
| PERMANOVA (materials) | Ivy/plum (91%) | Mulberry (100%) | F = 7.32 | 0.002 | η2 = 0.58 |
*Effect sizes interpreted as r ≥ 0.5 (large), η2 ≥ 0.14 (large); **a.u.: arbitrary units.
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