Exam 1

  1. Metainformation

    Tag Value
    fileProbability_uva-general-rules-1170-en_uva-general-rules-1170-en
    nameuva-general-rules-1170-en
    sectionProbability/Elementary Probability/General Rules
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeConceptual, Calculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    You bought two lottery tickets. The first X has a profit expectation of € 0.60 with a standard deviation of € 0.75 and the second Y has € 0.75 profit expectation with € 0.32 standard deviation. If you exclude the cost of the lots, what is your expectation value of the total profit and its standard deviation?


    1. FALSE: ΜX+Y = 0.60; σX+Y = 1.07
    2. TRUE: ΜX+Y = 1.35; σX+Y = 1.07
    3. FALSE: ΜX+Y = 0.75; σX+Y = 1.07
    4. FALSE: ΜX+Y = 1.35; σX+Y = 0.53

    1. ΜX+Y = 0.60; σX+Y = 1.07: Incorrect
    2. ΜX+Y = 1.35; σX+Y = 1.07: Correct
    3. ΜX+Y = 0.75; σX+Y = 1.07: Incorrect
    4. ΜX+Y = 1.35; σX+Y = 0.53: Incorrect