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Point Differential - The NBA Power Stat

Discussion in 'Houston Rockets: Game Action & Roster Moves' started by poprocks, Mar 11, 2008.

  1. just a word

    just a word Member

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    ...given that the rockets diff is now +2.5 does that mean that they're on track for roughly 45 wins? :grin:
     
  2. arjun

    arjun Member

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    i dont buy this

    point differntial doesn't mean ****.

    teams like the heat and thunder take many nights off..they dont start playing for real till the 4th quarter and only win by few points
     
  3. hocash

    hocash Contributing Member

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    And yet the stats say otherwise.
     
  4. NL Rocket

    NL Rocket Member

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    Stats can only tell you so much but of course if it's high, you have a good chance at beating teams because you're offense and defense are solid that both can win you games.
     
  5. Outlier

    Outlier Member

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    So if the season ended today, 50% OKC is winning it this year with +8.4, with Spurs not far behind with +8.1.

    Curious, were the Heat tops last year in PD?
     
  6. Bublanski

    Bublanski Member

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    JESUS H. CHRIST.

    WTF is going on with sports today?

    Gone are the days of just watching sports and just analyzing what you see.
     
  7. durvasa

    durvasa Contributing Member

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    And yet the Thunder and Heat are 2nd and 4th in point differential, respectively. Same as their ranking according to winning percentage.
     
  8. HMMMHMM

    HMMMHMM Contributing Member

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    No. Bulls were #1, Spurs #2, Thunder #3, Heat #4.

    http://espn.go.com/nba/standings/_/year/2012

    I do think there's something to certain teams not playing as hard or taking off games every now and then whereas other teams will always play at their near best.

    PD is a good indicator of strength, but it would be foolish to ignore the eye test.

    Spoelstra won't use some of the Heat's most effective plays during the regular season. He didn't last year and I haven't seen him to so this year.
    In the last three years the Celtics post-season winning% has been better than during the regular season. That's no fluke.
    Deeper teams without true elite players likely won't do quite as well either, see DEN, CHI, SAS.
     
  9. lightningbolt

    lightningbolt Member

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    You can't go by the numbers you posted because those point differentials are on a per game basis, whereas the original article uses point differential per 100 possessions, which accounts for game pace. Those numbers can be found here: http://espn.go.com/nba/hollinger/teamstats. I took the liberty of calculating the point differentials per 100 possessions, as well as the projected wins/losses according to the formula from the article:

    HTML:
    RK TEAM           PF100   PA100   PD100 W     L
    1  Oklahoma City  109.9   100.2   +9.7  64.8  17.2  
    2  San Antonio    106.9   98.4    +8.5  61.9  20.1  
    3  LA Clippers    107.0   98.8    +8.2  61.1  20.9  
    4  Miami          109.0   101.5   +7.5  59.4  22.6  
    5  New York       108.1   103.0   +5.1  53.5  28.5  
    6  Memphis        100.4   97.1    +3.3  49.1  32.9  
    7  Denver         105.5   102.4   +3.1  48.6  33.4  
    8  Chicago        100.2   97.5    +2.7  47.6  34.4  
    9  Golden State   104.3   101.9   +2.4  46.9  35.1  
    10 LA Lakers      105.9   103.6   +2.3  46.6  35.4  
    11 Indiana        98.7    96.5    +2.2  46.4  35.6  
    12 Houston        105.2   103.5   +1.7  45.1  36.9  
    13 Brooklyn       104.6   103.4   +1.2  43.9  38.1  
    14 Atlanta        102.1   101.0   +1.1  43.7  38.3  
    15 Milwaukee      100.5   100.3   +0.2  41.5  40.5  
    16 Boston         99.6    100.3   -0.7  39.2  42.8  
    17 Toronto        104.0   105.6   -1.6  37.0  45.0  
    18 Utah           103.3   104.9   -1.6  37.0  45.0  
    19 Portland       102.0   104.0   -2.0  36.0  46.0  
    20 Detroit        101.2   103.5   -2.3  35.3  46.7  
    21 Dallas         101.8   104.3   -2.5  34.8  47.2  
    22 Minnesota      99.7    102.4   -2.7  34.3  47.7  
    23 Philadelphia   99.9    103.3   -3.4  32.6  49.4  
    24 Orlando        100.7   104.7   -4.0  31.1  50.9  
    25 New Orleans    102.0   106.2   -4.2  30.6  51.4  
    26 Phoenix        99.7    104.8   -5.1  28.4  53.6  
    27 Washington     95.2    100.6   -5.4  27.7  54.3  
    28 Cleveland      99.3    106.6   -7.3  23.0  59.0  
    29 Sacramento     100.9   108.2   -7.3  23.0  59.0  
    30 Charlotte      98.9    108.1   -9.2  18.3  63.7  
    
     
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  10. CertifiedTroll

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    I cant understand graphs that dont have a slope of one and going through the midle thing
     
  11. torocan

    torocan Member

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    Huh?

    Toney Parker, Tim Duncan and Manu Ginobli?

    Maybe Manu isnt', but if Toney Parker and Tim Duncan aren't Elite players I would be curious to know what you consider "true elite" players...
     
  12. Commodore

    Commodore Contributing Member

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    Point differential is not a particularly useful stat (other than to see if a team is winning over/under what they should within a small sample)

    Point differential is an outcome, an output you are hoping to achieve. What you want to know are the inputs that result in a high point differential.
     
  13. lightningbolt

    lightningbolt Member

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    Oops, I just realized that you guys were talking about the 2011-12 season. Here are the point differentials per 100 possessions for that season, as well as the projected wins based on the formula from OP (adjusted to a 66-game season) and the actual wins:
    HTML:
    RK TEAM           PF100   PA100   PD100  PROJECTED WINS  ACTUAL WINS
    1  Chicago        104.5   95.3    +9.2   51.2            50          
    2  San Antonio    108.5   100.6   +7.9   48.6            50          
    3  Miami          104.3   97.1    +7.2   47.2            46          
    4  Oklahoma City  107.1   100.0   +7.1   47.0            47          
    5  Philadelphia   101.7   96.6    +5.1   43.1            35          
    6  Atlanta        102.4   98.6    +3.8   40.5            40          
    7  Boston         98.9    95.5    +3.4   39.7            39          
    8  Indiana        103.5   100.4   +3.1   39.1            42          
    9  Denver         106.5   103.4   +3.1   39.1            38          
    10 New York       101.4   98.4    +3.0   38.9            36          
    11 LA Clippers    105.2   102.9   +2.3   37.5            40          
    12 Memphis        101.0   98.9    +2.1   37.1            41          
    13 LA Lakers      103.3   101.7   +1.6   36.1            41          
    14 Dallas         101.0   99.7    +1.3   35.5            36          
    15 Orlando        102.4   101.7   +0.7   34.4            37          
    16 Houston        102.8   102.1   +0.7   34.4            34          
    17 Utah           103.7   103.6   +0.1   33.2            36          
    18 Milwaukee      102.4   102.4   0.0    33.0            31          
    19 Phoenix        103.5   103.8   -0.3   32.4            33          
    20 Portland       102.8   103.7   -0.9   31.2            28          
    21 Minnesota      101.5   103.6   -2.1   28.8            26          
    22 Golden State   103.1   106.0   -2.9   27.2            23          
    23 Toronto        98.5    101.5   -3.0   27.0            23          
    24 New Orleans    98.3    102.3   -4.0   25.0            21          
    25 Sacramento     101.0   106.8   -5.8   21.5            22          
    26 Washington     97.8    103.8   -6.0   21.1            20          
    27 Detroit        97.8    104.0   -6.2   20.7            25          
    28 New Jersey     99.7    106.9   -7.2   18.7            22          
    29 Cleveland      98.1    106.0   -7.9   17.3            21          
    30 Charlotte      92.3    107.8   -15.5  2.3             7
    
     
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  14. heypartner

    heypartner Contributing Member

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    This is the SECOND simplest and most accurate stat to measure playoff seeding.

    The #1 stat throughout the regular season is Road Wins vs Home Losses -- not as a %, but as a +/- (note, W/Ls is also a +/- stat).
     
  15. HMMMHMM

    HMMMHMM Contributing Member

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    Thanks lightningbolt, I just assumed the article was about "normal" PD, as I was unaware of adjusted PD.

    Well, Parker is having a career year and Duncan is playing better than he has in years himself. These guys just weren't elite these past year. Manu is and has been a stud, but he can only play so many minutes and as good as Parker and Duncan have been this season I question whether they'll be able to play as well in the playoffs.

    The true elite according to myself currently consists of LeBron, Durant and Chris Paul.
    Howard was arguably in that group when he was healthy. Guys like Rose, Harden, Kobe, Wade, Westbrook & Melo are close, but probably a tier below. Then you have guys Love, LMA, Bosh, etc... and that's probably where I'd put the big three of the Spurs. Those guys are still really good, but there's a significant difference between the best of the best and those guys, as they can't carry their team for long stretches.
     
  16. Outlier

    Outlier Member

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    Wow, Miami sucks using that. 10-3. While Spurs + OKC are way above everyone else.
     
  17. durvasa

    durvasa Contributing Member

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    When dealing with a small sample of games -- say, less than 25 -- point differential will give you a better overall view of how good/bad the team is than win-loss record. That is, point differential will give you better projections for the percentage of games the team will win the rest of the way than win-loss record on average. However, the more games the team plays, the less benefit point differential provides as a predictive tool over win-loss record. After 50 games or so, its probably negligible.
     
  18. underoverup

    underoverup Member

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    Since this saga started that is the craziest interview he's given IMO or I should say the craziest he has sounded anyway.
     
  19. underoverup

    underoverup Member

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    ^ wrong thread :eek:
     
  20. heypartner

    heypartner Contributing Member

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    ?? That's what Pt Differential says, too. Pt Diff has them as 4th best team in the league. So, not sure what you point is. Do you know that +/- RW v HLs mathematically converges on actual playoff seeds, while Pt Diff does not.

    Yes, I know they are the defending champs, and best team in the league. But, currently, each stat has them 4th or 5th in the league.

    Miami better get their **** together, because a .500 road record won't get you home court in the Finals. And they likely will. Notice they have played the least amount of games against the East than any other Eastern team.
     

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