| Value |
Category |
| -9 |
|
| -7 |
na |
| 0 |
incorrect or no response |
| 1 |
correct |
| 2 |
point at correct (but couldn't say number) |
| 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.