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Canvas Analytics and the median value

Question asked by Mark (AD) Herriott on Apr 21, 2016
Latest reply on May 29, 2016 by chofer@morainepark.edu

So, here are the analytics for a particular midterm on our Canvas site:

 

Median Values in Canvas.png

 

So far, so good, right?

 

Well, when I look at the quiz statistics in the gradebook, I get this:

 

Average Score:49
High Score:58
Low Score:34
Total Graded Submissions:44 submissions

 

44 submissions, check. Sort by grade in the gradebook, count down 22 values and I find that I am in the exact middle of a group of five identical scores, all at 51 points.

 

How on earth does Canvas calculate a median score and get 50.4? Even if you add in three non-submissions as "values", you would still get a whole number (because our # of submissions is now odd). Anyone else getting these anomalous results?

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