#51  
Old 10-11-2020, 10:26 AM
DiscFifty DiscFifty is offline
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Originally Posted by Discette View Post
The round was more than 2.5 standard deviations below his current rating.
Thank you! Now...any idea what a standard deviation is?
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  #52  
Old 10-11-2020, 12:22 PM
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brutalbrutus brutalbrutus is offline
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Thank you! Now...any idea what a standard deviation is?
Google probably knows.
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  #53  
Old 10-11-2020, 01:53 PM
Jugular Jugular is offline
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Quote:
Originally Posted by DiscFifty View Post
Thank you! Now...any idea what a standard deviation is?
It's the square root of the average of the distance of each point in the distribution from the mean.

Most people assume a Normal distribution (or bell curve) when talking about standard deviations and I would assume that's the case here, but it could easily be something else.

2.5 standard deviations below the mean in a Normal distribution should mean all but the 0.31% worst rounds should be included in their rating. i.e. if they played 10,000 rounds the 31 worst rounds would be discarded.

Exactly how they're calculating the standard deviations for each player I'm not sure, I would suspect that by now if there were a fixed ratio or rating point difference it would have been deduced by now. In which case it may be based on fitting a distribution to their range of rounds. i.e. if a player is less consistent then a round would have to be worse to be discarded than a round from a more consistent player.

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