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Bug 145927

Summary:	Use a more intelligent 'top rated' algorithm.
Product:	updatecenters	Reporter:	tomzi <tomzi>
Component:	Pluginportal	Assignee:	David Botterill <dbotterill>
Status:	RESOLVED FIXED
Severity:	blocker
Priority:	P3
Version:	6.x
Hardware:	All
OS:	All
Issue Type:	ENHANCEMENT	Exception Reporter:

Description tomzi 2008-09-02 14:28:09 UTC

Currently if one user rated a module 5* then the module seems to be already on the top.

Imdb for example uses following algorithm (http://www.imdb.com/chart/top), which takes minimum nb of votes etc into account:

>>The formula for calculating the Top Rated 250 Titles gives a true Bayesian estimate:

weighted rating (WR) = (v ÷ (v+m)) × R + (m ÷ (v+m)) × C

 where:
  R = average for the movie (mean) = (Rating)
  v = number of votes for the movie = (votes)
  m = minimum votes required to be listed in the Top 250 (currently 1300)
  C = the mean vote across the whole report (currently 6.7)
<<

Comment 1 Jiri Kovalsky 2009-03-09 09:42:08 UTC

Rating now takes into account number of votes. The feature is implemented finally.