Table 4. Kruskal-Wallis test to compare pre- and post-test scores among schools.
| Pre-test Score | Post-test Score | |||||||
|---|---|---|---|---|---|---|---|---|
| Schools | Median (IQR) | Median rank test score | χ2* | p-value | Median (IQR) | Median rank test score | χ2* | p-value |
| BUK | 35.0(15.0) | 103.5 | 5.3 | 0.26 | 65.0(37.5) | 126.3 | 10.7 | 0.03 |
| ESUT | 35.0(17.5) | 97.6 | 60.0(21.3) | 103.6 | ||||
| NAU | 50.0(15.0) | 132.2 | 60.0(32.5) | 113.5 | ||||
| UNILAG | 40.0(20.0) | 118.2 | 60.0(15.0) | 97.4 | ||||
| UNN | 37.0(13.8) | 95.0 | 60.0(15.0) | 97.2 | ||||
χ2* = Kruskal-Wallis test, BUK = Bayero University, Kano; ESUT = Enugu State University of Science and Technology, Enugu; NAU = Nnamdi Azikiwe University, Awka; UNILAG = University of Lagos; UNN = University of Nigeria, Nsukka.