Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-rules-for-expected-values-626-en_uva-rules-for-expected-values-626-en
    nameuva-rules-for-expected-values-626-en
    sectionProbability/Elementary Probability/Random variables/Rules for expected values
    typeschoice
    solutionFALSE, FALSE, FALSE, TRUE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    Three hundred patients were treated for insomnia using one of three methods A, B or C. At the end of the treatment, they were asked for their opinion about the treatment. The results are shown in the following cross tabulation:

    ———— ———– ———– ———– —– method A method B method C 45 60 177 34 31 80 21 9 43 100 100 100 300 ———— ———– ———– ———– —–

    One person is randomly drawn from these 300 individuals. We define the following two events:Ê A: the person was treated with method A. B: the person’s assessment of his method was: "good”.  P(A ∩ B) =


    1. FALSE: 0.68
    2. FALSE: 0.33
    3. FALSE: 0.59
    4. TRUE: 0.24

    1. 0.68: Incorrect
    2. 0.33: Incorrect
    3. 0.59: Incorrect
    4. 0.24: Correct