Sample Spaces and Assignment of Probability

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Probability Sample Spaces Assigning Probability ConclusionTaking a QuizExampleHow likely are you to get all three answers in the True/False quizcorrect if you guess on each question?S = {TTT , TTF , TFT , TFF , FTT , FTF , FFT , FFF }A few rules before we actually assign probabilities.Rules for Assigning ProbabilityFor each outcome W , 0 ≤ Pr[W ] ≤ 1The sum of the probabilities of all outcomes is one.Equally Likely OutcomesPr[TTT ] = Pr[TTF ] = . . . = Pr[FFF ] = 1c(S) = 1 8
Probability Sample Spaces Assigning Probability ConclusionTaking a QuizExampleHow likely are you to get all three answers in the True/False quizcorrect if you guess on each question?S = {TTT , TTF , TFT , TFF , FTT , FTF , FFT , FFF }A few rules before we actually assign probabilities.Rules for Assigning ProbabilityFor each outcome W , 0 ≤ Pr[W ] ≤ 1The sum of the probabilities of all outcomes is one.Equally Likely OutcomesPr[TTT ] = Pr[TTF ] = . . . = Pr[FFF ] = 1c(S) = 1 8
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Sample Spaces and Assignment of Probability

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