What is a better way to sort by a 5 star rating?

Posted by Vizjerai on Stack Overflow See other posts from Stack Overflow or by Vizjerai
Published on 2009-09-11T14:24:01Z Indexed on 2010/03/26 21:03 UTC
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rating

I'm trying to sort a bunch of products by customer ratings using a 5 star system. The site I'm setting this up for does not have a lot of ratings and continue to add new products so it will usually have a few products with a low number of ratings.

I tried using average star rating but that algorithm fails when there is a small number of ratings.

Example a product that has 3x 5 star ratings would show up better than a product that has 100x 5 star ratings and 2x 2 star ratings.

Shouldn't the second product show up higher because it is statistically more trustworthy because of the larger number of ratings?

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