CLASS SIZE = 100

ITEM  UPPER  LOWER  DIFFERENCE   D   MIDDLE  TOTAL  DIFFICULTY

1. A    4      9 
  *B   20     10         10     .37    19     49       .49
   C    2      5 
   D    1      3 
   O
----------------------------------------------------------------

2. A    2      8
   B    2      3
  *C   17      9          8     .30     15     34       .34 
   D    6      7
   0
----------------------------------------------------------------

3. A    6      7               
   B    7      8  
  *C    7      5          2     .07      7     19       .19      
   D    7      7
   0
----------------------------------------------------------------




                                       replace
                                       missing
                                       students      
                                          
     
                                               so total
                                           is actual total