Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-one-sample-mean-865-en_uva-one-sample-mean-865-en
    nameuva-one-sample-mean-865-en
    sectionInferential Statistics/Parametric Techniques/t-test/One sample mean
    typeschoice
    solutionFALSE, TRUE, FALSE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty3.031
    p-value0.2929

    Question

    One wants to test the hypothesis that the average IQ of Utrecht politicians is 110, against the alternative that the average is higher. In a random sample of 25 politicians from Utrecht, the mean IQ is calculated to be 116 with a standard deviation of 15. the mean IQ is 116 with a standard deviation of 15. It is assumed that IQ is normally distributed. The null hypothesis can now be rejected at a significance level of


    1. FALSE: 0.025
    2. TRUE: 0.05 but not from 0.025
    3. FALSE: 0.10 but not from 0.05

    1. 0.025: Incorrect
    2. 0.05 but not from 0.025: Correct
    3. 0.10 but not from 0.05: Incorrect