Interception Odds?

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  • dmolition
    SBR High Roller
    • 10-10-08
    • 106

    #1
    Interception Odds?
    If a QB has averaged 11 int in his 14 games and
    and is playing a team that averaged 22 int in their last 16 games,

    how do i get the expected interception for this particular game, im having trouble normalizing.
  • Justin7
    SBR Hall of Famer
    • 07-31-06
    • 8577

    #2
    Expected INT = QB Int rate * Def int rate / League avg int rate

    What is the league average?
    Comment
    • Thremp
      SBR MVP
      • 07-23-07
      • 2067

      #3
      I approve the new J7 message answering "Log5" when "Log5" is the correct answer. Little worried we'd be making a power ranking, but all is well.
      Comment
      • Justin7
        SBR Hall of Famer
        • 07-31-06
        • 8577

        #4
        Originally posted by Thremp
        I approve the new J7 message answering "Log5" when "Log5" is the correct answer. Little worried we'd be making a power ranking, but all is well.
        Thremp,

        Why don't you explain your approach? Do you have any empirical evidence that one approach works better on an interception prop?
        Comment
        • gotemcoach1523
          SBR Wise Guy
          • 11-05-09
          • 692

          #5
          Go steelers!!!
          Comment
          • lemart5
            SBR MVP
            • 01-12-11
            • 2818

            #6
            what is the league average for expected INT?
            Comment
            • Thremp
              SBR MVP
              • 07-23-07
              • 2067

              #7
              Originally posted by Justin7
              Thremp, Why don't you explain your approach? Do you have any empirical evidence that one approach works better on an interception prop?
              Do you understand what I said?

              Serious question. If so, do you understand what you said?

              Hint: They're not different.

              The last sentence then remarks on how you've upgraded your knowledge since the last iteration of this style question came around.
              Comment
              • dmolition
                SBR High Roller
                • 10-10-08
                • 106

                #8
                Thanks for the response,

                just want to check up the math,

                So if i understand correctly a QB int rate is 11 int in 400 passing attempts multiplied by 100
                so its int rate would be 2.75

                Same goes for defense i imagine, so lets say defense int rate is 2.6

                and league average could be 2.2 (the league average for QB int rate right?)

                Exp INT = (2.75*2.6)/2.2
                Exp INT= 3.25

                Thanks again.
                Comment
                • Thremp
                  SBR MVP
                  • 07-23-07
                  • 2067

                  #9
                  Justin7,

                  Do you have empirical evidence that Bayes Theorem is incorrect?
                  Comment
                  • Justin7
                    SBR Hall of Famer
                    • 07-31-06
                    • 8577

                    #10
                    No.
                    Comment
                    • Thremp
                      SBR MVP
                      • 07-23-07
                      • 2067

                      #11
                      Originally posted by Justin7
                      Thremp, Why don't you explain your approach? Do you have any empirical evidence that one approach works better on an interception prop?
                      Could you point out why you view what I wrote as "my" approach? I only see one approach possibly suggested in this thread. Once explained in process and once by name. There seems to be some misunderstanding.
                      Comment
                      • dmolition
                        SBR High Roller
                        • 10-10-08
                        • 106

                        #12
                        What method would you use Thremp?
                        Comment
                        • Thremp
                          SBR MVP
                          • 07-23-07
                          • 2067

                          #13
                          dmolition,

                          Was I unclear at some point? My first post pretty clearly explains the methodology I'd use. And my approval of answering a question correctly in an authoritative tone, as opposed to incorrectly in an authoritative tone.
                          Comment
                          • dmolition
                            SBR High Roller
                            • 10-10-08
                            • 106

                            #14
                            Originally posted by Thremp
                            dmolition,

                            Was I unclear at some point? My first post pretty clearly explains the methodology I'd use. And my approval of answering a question correctly in an authoritative tone, as opposed to incorrectly in an authoritative tone.
                            I take it from your first post you would use some kind of Log5 analysis for the expected QB int rate.

                            I know log5 analysis from baseball but that is all, any recommended books where i can find the basics of log5 probabilities so i can come to the conclusion on my own then?

                            Thanks for the help.
                            Comment
                            • Thremp
                              SBR MVP
                              • 07-23-07
                              • 2067

                              #15


                              Its from that, which is apparently a derivative of Bayes Theorem.
                              Comment
                              • dmolition
                                SBR High Roller
                                • 10-10-08
                                • 106

                                #16
                                Originally posted by Thremp
                                http://en.wikipedia.org/wiki/Odds_ratio

                                Its from that, which is apparently a derivative of Bayes Theorem.
                                Thanks i'll check it out.
                                Comment
                                • sonnyhowitzer
                                  SBR High Roller
                                  • 01-16-11
                                  • 135

                                  #17
                                  what a game.
                                  Comment
                                  • sonnyhowitzer
                                    SBR High Roller
                                    • 01-16-11
                                    • 135

                                    #18
                                    steel too many turn overs odds on win 11%
                                    Comment
                                    • CyberSleuth
                                      Restricted User
                                      • 02-10-11
                                      • 33

                                      #19
                                      Interesting thread, and thanks for the link.
                                      Comment
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