| Value | Category | Cases | |
|---|---|---|---|
| 1 | difficult | 169 |
31.2%
|
| 2 | easy | 138 |
25.5%
|
| 3 | neutral | 127 |
23.5%
|
| 4 | verydifficult | 58 |
10.7%
|
| 5 | veryeasy | 49 |
9.1%
|
| Missing value | 18 |