Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-bayesian-statistics-986-en_uva-bayesian-statistics-986-en
    nameuva-bayesian-statistics-986-en
    sectionInferential Statistics/Bayesian Statistics
    typeschoice
    solutionFALSE, FALSE, FALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    A company A owns three factories, namely A1, A2 and A3, TRUE where razors of the same type are made. The probability of a defective device at A1, A2 and A3 is, respectively: 0.1; 0.06 and 0.05. During a given period, all three factories in aggregate make 10,000 shavers of which 2000 are made by A1, 5000 by A2 and 3000 by A3. From the total production an inspector randomly chooses a shaver and the chosen razor turns out to be defective. What is the probability P(A1|D) that it came from factory A1?


    1. FALSE: 0,015
    2. FALSE: 0,020
    3. FALSE: 0,030
    4. TRUE: 0,308
    5. FALSE: 0,065

    1. 0.015: Incorrect
    2. 0,020: Incorrect
    3. 0,030: Incorrect
    4. 0.308: Correct
    5. 0.065: Incorrect