Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-random-variables-265-en_uva-random-variables-265-en
    nameuva-random-variables-265-en
    sectionProbability/Elementary Probability/Random variables
    typeschoice
    solutionFALSE, FALSE, FALSE, TRUE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2.77
    p-value0.4322

    Question

    A record was kept of how many cigarettes from 60 individuals for one month they smoke (rounded) daily. The results are shown in the frequency table

    ———— —- — — — — — — —- —- —- —- —- ——– Cigarettes 0 1 2 3 4 5 7 10 12 15 20 30 Total Frequency 36 4 3 3 4 2 1 2 1 2 1 1 1 60 ———— —- — — — — — — —- —- —- —- —- ——–

    If we draw 2 individuals from this group (with reversal) then the probability that at least one of them is a smoker (i.e., on average smokes 1 or more cigarettes per day) is equal to


    1. FALSE: 0.16
    2. FALSE: 0.36
    3. FALSE: 0.48
    4. TRUE: 0.64

    1. 0.16: Incorrect
    2. 0.36: Incorrect
    3. 0.48: Incorrect
    4. 0.64: Correct