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.
Question post text
IN ADDITION TO THE HEAD TEACHER, SELECT TWO TEACHERS. TEACHER 1 FROM GRADES 3 OR 4 - TEACHER 2 FROM GRADES 6, 7 OR 8.
CHOOSE THE TEACHER IN EACH GROUP BY TAKING THE ONE WHOSE FAMILY NAME IS FIRST IN ALPHABETICAL ORDER.