Exam 1

  1. Metainformation

    Tag Value
    fileProbability_vufsw-expectedvalue-1098-en_vufsw-expectedvalue-1098-en
    namevufsw-expectedvalue-1098-en
    sectionprobability/elementary probability/random variables/expected value
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE, FALSE, FALSE
    Typeperforming analysis
    Programcalculator
    LanguageEnglish
    Levelstatistical literacy

    Question

    Below you can find a probability distribution.

    What is the expected value E(y) of this distribution?


    1. FALSE: 0.60
    2. TRUE: 1.12
    3. FALSE: 2.20
    4. FALSE: 0.40
    5. FALSE: 2.00
    6. FALSE: 0.25

    Solution

    To calculate the expected value E(y) = ΣY*P(y) = (0)(0.40) + (1)(0.26) + (2)(0.21) + (3)(0.08) + (4)(0.05) = 0 + 0.26 + 0.42 + 0.24 + 0.2 = 1.12


    1. False
    2. True
    3. False
    4. False
    5. False
    6. False