There have been quite a few posts recently where statistics are given to drive home specific points that go against conventional wisdom and general belief. Some of the correlations are stronger than others, but the posts are meant to insist that the correlation proves something. I feel it is very important that we make sure to know the difference between correlation and causation. This is pulled from stats.org:
If you want to read the rest of the article you can here: http://www.stats.org/faq_vs.htm
Just because numbers show something to be correlated, it may not mean it is the cause. There can be other factors. For example, if a study showed a correlation of sleeping with your shoes on and waking up with a headache. From that one could conclude that people tend to fall asleep with their shoes on when they are drunk, and when people are drunk they tend to wake up with a headache. My point is, statistics can be deceiving, especially when they sound like a stretch. Instead, using common sense, observation, and taking into account all factors will probably give you a better idea than any statistics will. There is a reason that KC Joyner is a self-proclaimed "football scientist" for a website instead of a general manager.
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Great stuff. "Correlation doesn't equal causation" is taught in basic science classes everywhere. :up:
IMO it's useful to reflect on and critically examine one's own thinking with regard to any pursuit. This is but one important example of how that can be done.Ophinerated and sports24/7 like this. -
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Ugh, how about this:
"Correlation matched with observation of events leads to logical conclusions"?
This is one of the many many problems with a stats based approached to sports, "we" see things, stats say otherwise, what is more accurate?
When in doubt, trust what you see, not what the stats say, your eyes do not lie to you, however you may not know what you are seeing..that is where stats enter the picture.Ophinerated, MonstBlitz, shouright and 2 others like this. -
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Another reason this thread is relevant:
"There is an inverse relationship between ice cream sales and car accidents in New Jersey."
FALSE.
The compounding factor is the weather. People buy more ice cream when the weather is nice and hot outside (few car accidents). On the other hand, people buy less ice cream when it it stormy, cold, icy, and generally bad weather out (more accidents). Therefore, correlation does not mean causation! -
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This is why insurance companies cut discounts if one lives within 10 miles of where one works or goes to school, stats wise the risk of accident is quite low. -
shula_guy Well-Known Member
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It's a very valid point and worth noting.
But it does NOT mean it's not worthwhile to see which factors correlate highly with winning. Especially when you're able to do so with the entire sample (all 32 NFL teams.) That makes a world of difference when you're talking about a sample of the population vs the entire sample. -
The problem with relying on what we see is that our memories are not perfect. How many of Brady's INTs on Sunday were tipped passes? How many of Ryan Tannehill's INTs this season were on tipped passes? I remember my eyes telling me that some of their INTs were a result of tipped passes. But I trust whoever was watching the game along with me and was responsible for recording that data more than my memory.Ophinerated and sports24/7 like this. -
Fin D likes this.
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Correlation not equalling causation is always a useful thing to keep in mind. But I think it's less a worry in a controlled environment like football, and sports in general. Since the game is bounded by rules and a time restriction it's easier to find causal links, as opposed to something like explaining why and how the ACA passed (my background is in political science, that's why I used that as an example). In other words, since there are only so many people on the field at once, doing only so many things at once, there are only so many reasons why a result occurred.
Football is difficult to analyze quantitatively because we don't have good ways to measure everything, yet. That's not an inherent flaw of stats or the idea of correlation. Even people who don't like the analyses that someone like shouright does use those ideas. When you watch the game and make observations and draw conclusions based on that you are seeing and use the relationship between what you saw and what you know about the nature of the game to draw conclusions you are making a correlation. It's just a less quantitatively rigorous one than what something like shouright does. -
shula_guy Well-Known Member
Shou is attempting to draw conclusions using incomplete data. You can draw your own conclusions for his intent. I feel he does it to intentionally bait you all into arguments solely for his own sadistic amusement.
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PFF's #2 rated Guard this year, it is a case of the stats saying he was not reallly very good, the eye ball test said otherwise. -
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shula_guy Well-Known Member
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A great quote:
-The gods did not reveal all things to men at the start; but as time goes on, by searching, they discover more and more.- Xenophanes (570-475 B. C. E)
You're wrong. let's move on.unluckyluciano and Stringer Bell like this. -
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there are certain metrics, that when factored together can predict to damn near 100% accuracy the standings in several sports. Football among them.
Those are just facts. -
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THill's issue was not Hartline and Co, it was flat out bad passes to often, that was a good example of stats and eyeballs agreeing. -
If "seeing" alone were sufficient, there would never be any disagreement about anything in this forum. -
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You can absolutely predict who will be good with a pretty high degree of certainty.
The Playoffs are a series of single events that make for a lot of uncertainty and randomness. That's when numbers tend to not matter as much.DevilFin13 likes this. -
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for example...
Matt Ryan.
for his career..when he equals or surpasses his career QB Rating, the Falcons were 38-3 going into that SF game. Now they are 38-4. (he had a 114 rating and lost) There is your randomness of a one game sample size.
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