| Value |
Category |
Cases |
|
| 1 |
All |
511 |
|
| 2 |
More than half |
18 |
|
| 3 |
Half |
6 |
|
| 4 |
less than half |
19 |
|
| 5 |
None |
278 |
|
| 9 |
No textbook |
906 |
|
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.
