Quote:
Originally Posted by Itse
Corsi does no such thing. Corsi is just a number. It does not suggest anything nor does it assume anything. It's just a piece of data about one specific thing. Any assumptions, suggestions or interpretations people make about that data is their own idea of what the number means.
There is absolutely nothing baked in Corsi that suggests it in any way measures luck.
Heck, even PDO, which was originally developed to specifically measure "luck" doesn't actually do that. Nor does it regress to mean either. (As proven by statistical analysis.)
The problem with advanced stats isn't the stats. It's people who think they know what they mean and who think it's easy to draw the right conclusions from them. Making the right conclusions about statistical data is actually generally really hard. Most scientists have trouble at it, and they're specifically trained for it.
It's a big reason why I think adding stats might actually degrade decisions coaches and managers makes. They are not trained to process lots of statistical information, which means they are very, very likely to draw the wrong conclusions from it. (Luckily teams have started to hire people for that work... Unfortunately some of them have pretty dodgy qualifications for professional statistical analysis.)
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I'm going to disagree that Corsi is just the number of shot attempts directed at the net. The intended use of what Corsi means is inherent to the number. When people say Corsi they don't just mean the difference in shot attempts, the underlying assumptions that give it value are included in any statement.
The validity of these assumptions is definitely questionable but the assumptions come with the number to form what Corsi is.
THis might just be semantics though.