| Rank | N | Mean | SD | t | df | Sig. (2-tailed) | SE |
Cumulative | 1 | 35 | 8.97 | 8.76 | −4.48 | 49 | 0.00 | 1.48 |
| 2 | 16 | 237.69 | 305.66 | - | - |
| 76.41 |
Dip | 1 | 35 | 4.29 | 5.23 | −2.61 | 49 | 0.01 | 0.88 |
| 2 | 16 | 70.44 | 151.82 |
| - |
| 37.96 |
BSc | 1 | 35 | 3.31 | 4.92 | −3.91 | 49 | 0.00 | 0.83 |
| 2 | 16 | 55.00 | 78.84 |
| - |
| 19.71 |
MSc | 1 | 35 | 1.03 | 1.67 | −3.69 | 49 | 0.00 | 0.28 |
| 2 | 16 | 71.38 | 114.29 |
| - |
| 28.57 |
PhD | 1 | 35 | 0.23 | 0.73 | −2.45 | 49 | 0.02 | 0.12 |
| 2 | 16 | 40.88 | 99.25 |
| - |
| 24.81 |