| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 21 |
20.6%
|
| 2 | easy | 48 |
47.1%
|
| 3 | neutral | 17 |
16.7%
|
| 4 | verydifficult | 3 |
2.9%
|
| 5 | veryeasy | 13 |
12.7%
|
| Missing value | 6 |