Interpreting your score on the second quiz
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220 people took the quiz

range [7.5,25], mean 19.5, median 19 out of a possible 25 points

Approximate letter grades

   >= 22     A
   >= 20     B
   == 19.5   B/C line
   >= 17     C
   == 16.5   C/D line
   == 16     C/D line
   >= 12.5   D
   <= 12     F