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Incorrect statistics in assignment analytics

Question asked by Julie Leifeld on Apr 1, 2019
Latest reply on Apr 19, 2019 by Kona Jones

Has anyone noticed that the statistics that are shown to the students for each assignment are wonky?  Looking at the graph, you expect it to be a box and whisker plot which shows all 4 quartiles for the grade distribution, but that doesn't seem to match the actual grades.  For instance, I gave an exam and got statistics as shown:

sample assignment details info

The high, average, and low scores are correct, but my quartiles for this exam were 100-87-78-53-15, which does not match this plot at all.  Can someone explain to me what's going on with this?

Outcomes