MovieChat Forums > Next Day Air (2009) Discussion > How to calculate the real (not inflated)...

How to calculate the real (not inflated) movie rating on IMDB

posted 16 years ago by johnnymonsarrat
5 replies | jump to latest

Hi!

When a film is released, a bunch of people (maybe in marketing!) rate it a 10. And a bunch of people (nursing a grudge?) rate it a 1.

So you get weird stuff like Next Day Air being voted a 9.7 out of 10 for a day.

Here's a way around that. Just eliminate all the 10's and 1's votes.

Right now, for example, there are 611 votes with an average of 6.6 stars. Multiply that out and that's a total of 4032.6 stars from everyone.

Subtract the 2630 stars that 263 people gave rating it a 10.

Subtract the 105 stars that 105 people gave rating it a 1.

This leaves 1297.6 stars divided among 243 people.

Therefore this film's real rating seems to be 5.3 and I would bet you $10 that it will settle in the 5.0-5.9 range a month from now.

-Johnny

[–] TheNextDirector 16 years ago

That makes a lot of sense. I need all the black films to be checked out this way.

[–] joato 16 years ago

ROFL

[–] jim-1627 16 years ago

Your formula seems valid, but only before the movie is released or very shortly after. Using your formula on most great movies lowers their value. Using it on poor ones increases their score:
The Dark Knight goes from 8.9 to 8.0
Son Of The Mask goes from 2.0 to 2.7

The IMDB ratings don't determine which movies I'll see opening night. My opening night decisions are based on the even more flawed practice of "Watching the Previews". For movies that have been out a few weeks, I look at the Bell Curve.

[–] kmartin173 16 years ago

An easier and more accurate way is to look at the rating given by the top 1000 voters. It can't be faked and/or manipulated.

[–] jim-1627 16 years ago

What is the criteria for a "Top 1000" voter.
Is it how often you vote, the frequency/length of your comments, or is it something in your profile. If it's based on any of these things, I'm sure the studios have shills that vote and comment on every movie ever made and look good doing it.
BTW Of the 18 "Top 1000" who voted on this movie, 3 gave it a 10 and 3 gave it a 1.