How Not To Sort By Average Rating
By Evan Miller
February 6, 2009 (Changes)
Translations:
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PROBLEM: You are a web programmer. You have users. Your users rate stuff on your site. You want to put the highest-rated stuff at the top and lowest-rated at the bottom. You need some sort of “score” to sort by.
WRONG SOLUTION #1: Score = (Positive ratings) − (Negative ratings)
Why it is wrong: Suppose one item has 600 positive ratings and 400 negative ratings: 60% positive. Suppose item two has 5...
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