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| Distance (m) | Expected | Observed | X2 | p |
| 25 | 10% | 50% | 160 | <0.001 |
| 50 | 10% | 30% | 40 | <0.001 |
| 100 | 10% | 20% | 10 | >0.1 |
| 150 | 10% | 10% | 0 | >0.1 |
The DFA was trained to classify observation bellows re-recorded at 25 m, 50 m, 100 m, and 150 m to each of the 10 males using bellows re-recorded at 1 m. The statistical significance of correct classification was obtained using the Chi square statistic.
