Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-rules-for-expected-values-604-en_uva-rules-for-expected-values-604-en
    nameuva-rules-for-expected-values-604-en
    sectionProbability/Elementary Probability/Random variables/Rules for expected values
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    The following cross tabulation includes data from 150 individuals for two variables A and B.

    ——- ——- ——- ——- A = 1 A = 2 A = 3 B = 1 19 50 13 B = 2 18 32 18 ——- ——- ——- ——-

    We randomly draw someone from among the 150 people. For this person, P(A = 1 ∪ B = 2) is equal to


    1. FALSE: 0.12
    2. TRUE: 0.67
    3. FALSE: 0.58
    4. FALSE: 0.7

    1. 0.12: Incorrect
    2. 0.67: Correct
    3. 0.58: Incorrect
    4. 0.7: Incorrect