|
| Dosso | Maradi | Tahoua | Zinder | Average | Chi-square |
Attack level | Low | 13 | 8 | 16.5 | 10 | 12 ± 0.04 | ns |
Fort | 47 | 50 | 47 | 69 | 53 ± 0.1 | ** | |
| Medium | 40 | 42 | 37 | 21 | 35 ± 0.1 | ** |