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    Marginal & Conditional Probability

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    See attached file for table.

    Which Probability formula should be used? Please explain.

    A researcher wants to prove the efficacy of three drugs to treat headaches. Results are given in the following table. If one of these subjects is randomly selected:

    12- Find the probability that the subject had a headache given that the subject was treated with Aleve answers : A) 0.56 B) 0.47 C) 0.74 D) 0.64

    is this P( A |B) probability that event A occurs given that event B has occurred already
    or P( B |A) probability that event B occurs given that event A has occurred already
    Please explain in detail

    13- Find the probability that the subject had no headache or was treated with Tylenol: answers A) 0.18 B) 0.52 C) 0.81 D) 0.33

    Is this P(A U B) = P(A) + P(B) - P(A n B)
    Please explain

    14- Find the probability of getting someone who was NOT treated with Aleve
    answers A) 0.80 B) 0.58 C) 0.54 D) 0.94

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    https://brainmass.com/statistics/conditional-probability-distribution/conditional-probability-efficacy-three-drugs-treat-414554

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    Solution Preview

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    Conditional Probability
    A researcher wants to prove the efficacy of three drugs to treat headaches. Results are given in the following table. If one of these subjects is randomly selected , see attached File

    12- Find the probability that the subject had a headache given that the subject was treated with Aleve answers : A) 0.56 B) 0.47 C) 0.74 D) 0.64
    Hint:
    Let A be the event that the subject had a ...

    Solution Summary

    The solution provides step by step method for the calculation of probabilities and conditional probabilities. Formula for the calculation and Interpretations of the results are also included.

    $2.19

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