| City |
| df | ss | ms | F | Significance F |
| Mbeya | Regression | 13 | 64.9 | 5.0 | 133.8 | 2.5 × 10−50 |
| Residual | 84 | 3.1 | 0.04 | |||
| Total | 97 | 68.0 |
| |||
| Dar es salaam | Regression | 13 | 105.3 | 8.1 | 91.5 | 2.8 × 10−75 |
| Residual | 194 | 17.2 | 0.1 | |||
| Total | 207 | 122.4 |
|