| Value | Category | Cases | |
|---|---|---|---|
| 1 | Difficult to understand and boring | 18 |
7.3%
|
| 2 | Easy to understand but boring | 23 |
9.4%
|
| 3 | Difficult to understand but interesting | 84 |
34.3%
|
| 4 | Easy to understand and interesting | 120 |
49%
|
| Sysmiss | 997 |