Author Topic: Stats. What are they good for?  (Read 15685 times)

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Re: Stats. What are they good for?
« Reply #45 on: March 05, 2013, 09:31:59 AM »

Offline D.o.s.

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If pierce is averaging 55 points a game but the celtics are losing then it means nothing and its obviously not working.

  I disagree with this. PP averaging 55 a game might be having a strong positive impact on the game, Antoine going 6-25 from behind the arc might be the reason you're losing those games. Trying to figure out whether we need PP to take fewer shots or keep Toine from taking all those threes is valuable, stats can help with that analysis.

  I also disagree with the thought that making s positive impact on a game is only worthwhile if your team ultimately wins the game but that's probably for another thread.

But if we can get 'Toine shooting those four point shots...
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Re: Stats. What are they good for?
« Reply #46 on: March 05, 2013, 09:35:14 AM »

Offline ssspence

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All about team stats and rankings. They're highly indicative of overall capabilities and philosophies (like Doc's disdain for O rebounds in lieu of getting back on defense). They typically tell a much more interesting story than individual stats.
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Re: Stats. What are they good for?
« Reply #47 on: March 05, 2013, 09:44:57 AM »

Offline Fafnir

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All about team stats and rankings. They're highly indicative of overall capabilities and philosophies (like Doc's disdain for O rebounds in lieu of getting back on defense). They typically tell a much more interesting story than individual stats.
I don't know the new camera systems are really cool. I loved the paper about shooting attempts and percentages based on distance from and court position of all the NBA big men.

If you're talking predictive power, sure team statistics are very robust compared to individual ones.

Re: Stats. What are they good for?
« Reply #48 on: March 05, 2013, 10:12:16 AM »

Offline BballTim

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If pierce is averaging 55 points a game but the celtics are losing then it means nothing and its obviously not working.

  I disagree with this. PP averaging 55 a game might be having a strong positive impact on the game, Antoine going 6-25 from behind the arc might be the reason you're losing those games. Trying to figure out whether we need PP to take fewer shots or keep Toine from taking all those threes is valuable, stats can help with that analysis.

  I also disagree with the thought that making s positive impact on a game is only worthwhile if your team ultimately wins the game but that's probably for another thread.

But if we can get 'Toine shooting those four point shots...

  That's one of my favorite Celts quotes, right up there with "it stinks and it sucks".

Re: Stats. What are they good for?
« Reply #49 on: March 05, 2013, 10:15:59 AM »

Offline D.o.s.

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If pierce is averaging 55 points a game but the celtics are losing then it means nothing and its obviously not working.

  I disagree with this. PP averaging 55 a game might be having a strong positive impact on the game, Antoine going 6-25 from behind the arc might be the reason you're losing those games. Trying to figure out whether we need PP to take fewer shots or keep Toine from taking all those threes is valuable, stats can help with that analysis.

  I also disagree with the thought that making s positive impact on a game is only worthwhile if your team ultimately wins the game but that's probably for another thread.

But if we can get 'Toine shooting those four point shots...

  That's one of my favorite Celts quotes, right up there with "it stinks and it sucks".

Agreed. Those bad Celtic teams were a lot of fun (away from the court, that is).
At least a goldfish with a Lincoln Log on its back goin' across your floor to your sock drawer has a miraculous connotation to it.

Re: Stats. What are they good for?
« Reply #50 on: March 05, 2013, 10:18:14 AM »

Offline fairweatherfan

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Casperian you dismiss stats because they're "fallacies" because they aren't some sort of higher truth? That's ridiculous, they're just pieces of evidence you use to examine the game. You don't throw away evidence just because its not complete telling of the entire game that happens on the court.

Advanced statistics are useful because human beings are crappy observers of reality. We make bad eye witnesses and are bad at considering the totality of performance, we focus on what we've just seen or what excites us.

Your attitude would have us never investigate physical mechanics or thermodynamics with models because they don't 100% describe the reality of what's happening in the physical world.

Quantum physics is just as useful as a horoscope.  ::)

I think a lot of these kinds of extreme stances boil down to conflating descriptive and inferential stats.  Reading between the lines I think that's what Casperian's doing, hence the "100% accurate or it's meaningless" refrain. 

Re: Stats. What are they good for?
« Reply #51 on: March 05, 2013, 10:24:21 AM »

Offline Evantime34

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Stats are good at backing up what you see with your eyes.

Advanced stats are getting to the point where they not only tell how many rebounds or points a player puts up but players overall value to their team and around the league.

Stats are useless however without the knowledge to understand exactly what they mean in the context of team basketball.
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Re: Stats. What are they good for?
« Reply #52 on: March 05, 2013, 10:35:18 AM »

Offline indeedproceed

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Statistics are 100% accurate. Cuz numbers. Inferences based on those statistics vary widely. Cuz people. Science.

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Re: Stats. What are they good for?
« Reply #53 on: March 05, 2013, 10:39:27 AM »

Offline kozlodoev

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Statistics are 100% accurate. Cuz numbers. Inferences based on those statistics vary widely. Cuz people. Science.
Pretty much. Stats mean nothing if you don't know how to use them, everything if you do.
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Re: Stats. What are they good for?
« Reply #54 on: March 05, 2013, 12:55:14 PM »

Offline nickagneta

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Stats help do things like keep the score and determine what your record is. Seems pretty important.

Re: Stats. What are they good for?
« Reply #55 on: March 05, 2013, 02:39:06 PM »

Offline guava_wrench

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I like how you guys put words into my mouth. Iīm not ignorant of stats, Iīm over them.

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No statistician claims that any combination of stats can account for 100% of variation in performance.

So, the placeholders donīt represent constant values. 1 isnīt actually 1, at least not always. You understand that this little sign (=) becomes a lie, right? All laws derivating from math involving them arenīt really laws, theyīre more like general rules of thumb, yes?

Your answer seems like a non sequitor.

1 isn't 1? What is that supposed to mean? "Constant values"? What are you talking about?

Games stats can describe what happened. For example RBIs can tell you what happened in a game, but they don't really tell us much about the ability of a player. Batting average with runners in scoring position would give us insight into a players ability beyond how it describes outcomes.

We should also take note that a players batting average is typically different every month. Why does that happen? That happens because for a hitting ability N, there is a distribution of likely outcomes. Someone who doesn't understand statistics might assume that if a player hits .320 one year, and the .300 the next, then he was more skilled the earlier year. Not necessarily. There is a pretty good chance that the difference could be accounted for by things other than his skill, such as facing better pitchers on average, fielder position, or other variables.

No stat gives us a full understanding of a players ability. Even Hollinger does not contest this. For example, Harden's PPG gives us good insight into his scoring ability, but PPG cannot give us a full picture. When he had 2 teammates who were elite scorers, he scored less. So, while the PPG is a very useful metric for understanding a player's scoring ability, it only tells us part of the story. Let's say, PPG gives us 25% of the story. That is still extremely significant. If we add to that other quantitative data, such as shooting percentages, and qualitative information, such as information about the system that the team plays, we get a very good understanding of the player's scoring ability.

For those who avoid nuance and want to believe that the world is black and white, I don't see this being appealing.

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When they can claim though is that stats can help us find value that is often missed when using our clearly flawed and biased perceptions. They help us make the best choice amidst the always present uncertainty.

Youīre making stuff up now, arenīt you? Which "clearly flawed perception" are you talking about? [/quote]

"Making stuff up"? I suspect this means you are completely unfamiliar with any research in neuroscience/cognitive science. Problems such as confirmation bias are universally accepted as flaws in our perceptions. There is such robust literature on how poor human memory is (and how selective), that there is no need for me to make stuff up. Stats help us to partially control for our cognitive biases by checking our opinions against objective data that independent observers agree is accurate. Perhaps assists may be to a degree a subjective stat, but field goals made is not.

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Stats are just a bunch of numbers without proper interpretation, just like the action on the court has to be interpreted. Considering how I read deeply flawed application of stats on this board alone on a daily basis, I have a hard time accepting their, at best, "general rule of thumb" as the incorruptible judge in any debate.

Yes, there are people who wrongly act like throwing out a stat closes their case. The truth is, most of the interesting discussions here are ones that fundamentally cannot be resolved. For example, we cannot run a controlled experiment where in one universe, Perk is not traded for Green, and in one, he is. On the other hand, we also often hear people make absurd claims that the statistical data make exceedingly unlikely to be true. You should not confuse the abuse of statistics with a lack of value.

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So, first of all, I question the neutrality of numbers interpreted by humans, and thus, all laws derivating from them. But you understand that, basically, as you wrote
I am not claiming that interpretation is neutral. What is neutral is that stats represent shared, objective facts.

There is a reason why front offices love stats. The reason is that their decisions matter. Since their decisions matter, they need to make the best decisions they can. On a forum like this, we don't make decisions about players. We usually just try to justify our opinions. This often leads to the abuse of statistics or to people sticking their fingers in their ears and singing "la la la la" when stats show the unlikelihood that their opinion holds any water.

Re: Stats. What are they good for?
« Reply #56 on: March 05, 2013, 05:46:52 PM »

Offline Fan from VT

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« Last Edit: March 05, 2013, 05:53:21 PM by Fan from VT »

Re: Stats. What are they good for?
« Reply #57 on: March 05, 2013, 05:57:33 PM »

Offline BballTim

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Re: Stats. What are they good for?
« Reply #58 on: March 06, 2013, 05:27:51 AM »

Offline Casperian

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Casperian you dismiss stats because they're "fallacies" because they aren't some sort of higher truth? That's ridiculous, they're just pieces of evidence you use to examine the game. You don't throw away evidence just because its not complete telling of the entire game that happens on the court.

No, thatīs not what Iīve said. I said the very basis on which these stats are built is wishy-washy, making it less than 100% certain that 1 is actually 1, thus any conclusion derived from it is not more than guesswork.

Let me put it this way:
You ever had word problems (in a mathematical sense) back in first grade? 1 apple + 1 apple + 1 apple = 3 apples?

I say no apple is the same. For all we know, one could be an orange.

Quote
Your attitude would have us never investigate physical mechanics or thermodynamics with models because they don't 100% describe the reality of what's happening in the physical world.

Can we stick to basketball, please?
Thermodynamics is a closed system, thatīs what the first law explicitly states, and I said nothing about the value of math there. However, thatīs not the case for a basketball game.

Games stats can describe what happened. For example RBIs can tell you what happened in a game, but they don't really tell us much about the ability of a player. Batting average with runners in scoring position would give us insight into a players ability beyond how it describes outcomes.

Again, can we stick to basketball? I wasnīt talking about baseball stats, I was specifically talking about basketball stats. The framing conditions of a baseball match are far more constant than of stats taken in a basketball game, anyway.

Statistics are 100% accurate. Cuz numbers. Inferences based on those statistics vary widely. Cuz people. Science.

Yep, except that basketball statistics are not 100% accurate. Cuz people....moving people. Btw, do you know of any spacing statistics? I mean, isnīt that what most coaches design their offense for? To create space? Seems pretty important to me, yet thereīs not a single stat about that (at least none Iīm aware of).

-----------------------------------------------------------

Well, guys, while I appreciate all the attention Iīm getting, I really canīt reply to every single post with the attention it deserves, however snarky itīs tone might be.

So, now that we all had a good laugh at my expense, how about some of you highly-educated folks prove your reading comprehension by actually answering my question, instead of me having to argue on 7 different level?

Show me a basketball stat which actually says what it is supposed to say, maybe with a nice, short explanation how that helps anyone instead of using deduction or experience, and I will explain to you while that is not the case. It really is that simple.
« Last Edit: March 06, 2013, 05:39:10 AM by Casperian »
In the summer of 2017, I predicted this team would not win a championship for the next 10 years.

3 down, 7 to go.

Re: Stats. What are they good for?
« Reply #59 on: March 06, 2013, 12:16:33 PM »

Offline nickagneta

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Show me a basketball stat which actually says what it is supposed to say, maybe with a nice, short explanation how that helps anyone instead of using deduction or experience, and I will explain to you while that is not the case. It really is that simple.
What you are doing is using a technique called "breaking it down to the ridiculous" to minimize the importance of stats as a tool for determining the performance of players or teams. You want to disprove something and hence prove your point.

But statistics in sport isn't about one stat and what it represents. Its about taking the stats and comparing them to others that other players and teams have accumulated and using them to judge the performances of the players or teams. No one statistic can do that. Only the accumulated total of all the stats can do that and even then, interpretation needs context and is still subjective.

If a PF gets 10 rebounds a game for three years does that make him a great PF? Such a question begs multiple other questions including statistical questions for proper context as well as what stats would a great PF have to have to be considered great?

In today's stat driven world its hard to describe a great PF as simply someone who scores a lot, rebounds a lot, and plats great defense. Details are needed. Sometimes statistical details.