There were 8 questions, each worth 10 points.  (Students chose which
8 of 10 questions to answer.)

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Twenty-four students took the exam.
The average was 64.4, the median 67.
The standard deviation was 6.5.
The high grade was 77, the low grade was 43.


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Grade histogram:

40-44  X
45-49  X
50-54  
55-59  X X X
60-64  X X X X
65-69  X X X X X X X X X X X
70-74  X X X
75-80  X


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The average grade for each question was 8.0, with a standard 
deviation of 0.9.


Per-question breakdown:

#      Avg  Stddev  Min  Max   Attempt histogram
1      9.5     0.7    8   10   XXXXXXXXXXXXXXXXXXXXXXX
2      7.8     2.5    3   10   XXXXXXXXXXXXXXXXXXXX
3      7.8     1.1    6   10   XXXXXXXXX
4      8.2     2.5    2   10   XXXXXXXXXXXXXXXXXXXXXX
5      8.8     1.5    5   10   XXXXXXXXXXXXXXXXX
6      7.1     2.2    4   10   XXXXXXXXXXXXXX
7      9.2     1.3    5   10   XXXXXXXXXXXXXXXXXXXXXXX
8      6.9     2.9    2   10   XXXXXXXXXXXXXXXXXXXXXXX
9      7.4     1.8    2   10   XXXXXXXXXXXXXXXXXXX
10     7.3     2.3    4   10   XXXXXXXXXXXXXXXXXXXXXX

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Per-question breakdown of the top four exams:

(The top four exams scored between 70 and 74.)


Per-question breakdown:

#      Avg  Min  Max   Attempt histogram
1      9.5    8   10   X X X X
2      9.5    9   10   X X
3       10   10   10   X
4       10   10   10   X X X X
5       10   10   10   X X X
6      6.7    4   10   X X X
7      9.3    7   10   X X X X
8      8.8    6   10   X X X X
9      9.3    9   10   X X X
10     8.8    7   10   X X X X


Question 3 was, in general, unloved, but questions 6 and 8 were
the toughest.