| Value |
Category |
| 1 |
Very easy |
| 2 |
Somewhat easy |
| 3 |
Neither easy nor difficult |
| 4 |
Somewhat difficult |
| 5 |
Very difficult |
| 6 |
Impossible |
| 7 |
Other |
| Sysmiss |
|
Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.