Value |
Category |
1 |
DIFF LEVER,SAME PROGRAM,DIFF SPEED |
2 |
ALL STD SAME LEVEL |
3 |
DIFF LEVEL,DIFF PROGRAM |
9 |
OMITTED |
11 |
.A |
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.