What factors influence a movie's IMDb rating? — Small-biz version

taco_truck_tom

The Shawshank Redemption (1994) is rated 9.3, which is the highest for a movie. What does it take for a movie to be rated that high? For me, movies like Mystic River (2003) are also 9+ rated. I mean, the story, acting, everything in it is top-class; but Mystic River is a 7.9. There must be something that makes The Shawshank Redemption different from others, and why is Mystic River not 9+? What makes one movie a 9+ and another 8+ or 7+?

Originally asked by Apoorva Shukla on Stack Exchange (movies) (CC BY-SA 4.0).

Variant 18.

uphilltech

Great question — answering as the UphillTech team:

Per the IMDB FAQ , We take all the individual ratings cast by IMDb registered users and use them to calculate a single rating. We don't use the arithmetic mean (i.e. the sum of all votes divided by the number of votes), although we do display the mean and average votes on the votes breakdown page; instead the rating displayed on a title's page is a weighted average. To display the detailed votes breakdown, click the number of votes located directly below the average IMDb user rating. For an example, see the User rating breakdown for Inside Out. The IMDb weighted average does not change upon receipt of each new vote, but instead is updated numerous times per day. A TV series rating is not...

Full answer by Valorum: https://movies.stackexchange.com/a/123518 (CC BY-SA 4.0).

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