Question about P-value and null hypothesis

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  • Inkwell77
    SBR MVP
    • 02-03-11
    • 3227

    #1
    Question about P-value and null hypothesis
    So say if I have a set of data that says I have
    335 successes out 587 trials

    Now if I assume the likelihood of having a success is .50 (null hypothesis) my p-value for this set of data is
    .0007

    Obviously a very unlikely event and is considered statistically significant.

    But if I reset the likelihood to being .53 (null hypothesis) the p-value then becomes
    .0527

    The null hypothesis is accepted.


    My question is what should one's null hypothesis be when striving to create a model? P(Win)=.55? P(Win)=.56?

    Null Hypothesis (Ho):Game; P(Win)=???
  • rsigley
    SBR Sharp
    • 02-23-08
    • 304

    #2
    failing to reject doesn't mean accept
    Comment
    • uva3021
      SBR Wise Guy
      • 03-01-07
      • 537

      #3
      Pick any person out from a population, is the null hypothesis such that their win prob is 50% or 53%? Now if you were selecting from a group of professionals who make a living betting, then the H_0 will be around 53%
      Comment
      • sayhey69
        SBR Hustler
        • 04-16-12
        • 50

        #4
        Originally posted by Inkwell77
        The null hypothesis is accepted.
        wat?!?
        Comment
        • 339955
          Restricted User
          • 07-20-12
          • 198

          #5
          uh oh inkwell you aer too dumb 4 sayhey you are getting all the pros mad at you. be careful, be right
          Comment
          • sayhey69
            SBR Hustler
            • 04-16-12
            • 50

            #6
            no not pro just paid attention in intro to statistics
            Comment
            • 339955
              Restricted User
              • 07-20-12
              • 198

              #7
              yeah i know sayhey i like stats too you can use it really good to predict stuff, model others and know about the probabilities and make some models i just wish inkwell would learn from that and not be so ignorant about his p stats
              Comment
              • Inkwell77
                SBR MVP
                • 02-03-11
                • 3227

                #8
                Thanks everyone.
                This type of feedback helps.
                Obviously I need to look into it more.
                Comment
                • jetsjets1028
                  SBR MVP
                  • 02-10-10
                  • 1234

                  #9
                  i was in ap stats class
                  Comment
                  • daneault23
                    SBR MVP
                    • 09-08-09
                    • 3863

                    #10
                    Majoring in Stats
                    Comment
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