| Zones lines | Mann-Whitney U test | |||
| n | Mean Rank | U | Sig. Bill (p-value) | |
| West South | 7 7 | 8.57 6.43 | 17.0 | 0.338 |
| East South | 7 7 | 5.43 9.57 | 10.0 | 0.064 |
| West East | 7 7 | 10.00 5.00 | 7.00 | 0.025* |