| Value |
Category |
| 0 |
|
| 1 |
Easy |
| 2 |
Relatively easy |
| 3 |
Somewhat difficult |
| 4 |
Difficult |
| 5 |
Can not |
| 6 |
Do not do |
| 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.