+++ MIDTERM HISTOGRAM +++


25 +
   |
   |
   | X X
   |
20 + X
   | X
   | X
   | X
   | X
15 +
   |
   |
   |
   |
10 +
   | X
   |
   |
   | X
 5 +
   |
   |
   |
   |
 0 +