| Value |
Category |
| 1 |
Exercsie Booklet #1 |
| 2 |
Exercise Booklet #2 |
| 3 |
Exercise Booklet #3 |
| 4 |
Exercise Booklet #4 |
| 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.
