0 +
    |
    |
    |
    |
  5 +
    |
    |
    |
    |
 10 +
    |
    |*
    |
    |
 15 +
    |*
    |
    |
    |
 20 +*
    |
    |
    |****
    |**
 25 +***
    |
    |*
    |*
    |*
 30 +
    |**
    |
    |
    |
 35 +*
    |*
    |**
    |
    |*
 40 +*
    |*
    |
    |
    |
 45 +*
    |*
    |*
    |
    |
 50 +
    +---------+---------+---------+---------+---------+
NUMBER OF SCORES: 27, MEAN: 30.074074 +/- 9.046898