Conquering risk - regression formula mistake

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  • jeffjam_
    SBR High Roller
    • 11-02-14
    • 107

    #1
    Conquering risk - regression formula mistake
    Hi, recently I've obtained the book Conquering risk: Attacking Vegas and I tried to create a simple WNBA model according to the author's demonstration. However, when I reached the point of using recommanded regression function to calculate projected visitor offensive efficiency, the function returns bad values as in the return value of proj off eff is 40 times greater than it should have been, which should be around 100.
    Have anyone tried to use it and stumbled upon the same problem? Maybe the function was inserted into the book flawed on the purpose. Thanks.
  • a4u2fear
    SBR Hall of Famer
    • 01-29-10
    • 8147

    #2
    i've read the book and while I've used regressions in similar techniques shown, i haven't tried to copy any verbatim and haven't for any for the WNBA.

    i'd suggest doing a little research on google for optimal use of excel regressions because it isn't the easiest output in the world to understand from Excel and you may be mis-interpreting the results.
    Comment
    • jeffjam_
      SBR High Roller
      • 11-02-14
      • 107

      #3
      You're right, the regression functions presented in the book are outdated and any use could cause fatal damage, however, my main concern is that function for VOE is returning values around 4000 instead of values around 100 so there is something fundamentally wrong with it. Anyway, I contacted the author of the book and he couldn't help me in any way so instead I decided to go Pomeroy's way of projecting Poss and Off/Def Eff.
      The little I know about regression is that it use past data to create functions to predict future (interpolate it in a way) other than that I don't know anything about creating one.
      Comment
      • James Marques
        SBR MVP
        • 03-04-14
        • 1605

        #4
        What do you expect from a book written in 10th grade mathematics?
        Comment
        • KVB
          SBR Aristocracy
          • 05-29-14
          • 74817

          #5
          Originally posted by James Marques
          What do you expect from a book written in 10th grade mathematics?
          Click image for larger version

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          • arwar
            SBR High Roller
            • 07-09-09
            • 208

            #6
            regression analysis

            nice reply - are the guys in the background holding shields? they look wooden. what kind of event is that - jousting? gladiators? vikings? i give up
            Comment
            • Waterstpub87
              SBR MVP
              • 09-09-09
              • 4102

              #7
              It is a scene from the movie Troy. They would be greeks.
              Comment
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