How difficult was the test and performance?
| Responding groups | No | % | Mean(%) | SD | x%min | x%max |
| Very easy | 1 | 0.4 | 50.8 | |||
| Easy | 17 | 7 | 63.33-150 | 14.3 | 30.5 | 81.4 |
| Moderate | 179 | 71 | 59.13-150 | 12.6 | 20.3 | 86.4 |
| Difficult | 53 | 21 | 54.83-150 | 15.2 | 18.6 | 79.7 |
| Very difficult | 4 | 2 | 48.7 | |||
| Total | 254 | 100 | 58.3 | 13.4 | 18.6 | 86.4 |
| Missing | 20 |
↵3-150 Analysis of variance, p<0.039.
x%min = minimum % correct answers; x%max = maximum % correct answers.