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How to calculate a percentage with ambiguous numbers?
Asked by ariherzog (33)
April 26th, 2011
Evaluation forms for a class I teach ask the student to circle a number between 1 and 5, but there is also a N/A column.
I want to know what percentage of my students enjoyed the class. If they only circle numbers, the calculation is easy. But if someone circles a NA, how can I calculate that? It’s not a zero. Thanks.
EDIT: Imagine there are 20 opportunities for someone to circle a 5. If 5 students circle all 5s and 5 students circle all 4s, then the average evaluation is 90% (assuming a 5 is 100 and a 4 is 80). But what number value is a NA?
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