Exam 1

  1. Metainformation

    Tag Value
    fileDistributions_uva-distribution-1879-en_uva-distribution-1879-en
    nameuva-distribution-1879-en
    sectionDistributions/Continuous/t-distribution
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty1.848
    p-value0.8081

    Question

    From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 12, mean = 26, sd = 7.48 Sample 2: n = 15, mean = 57, sd = 8.91. The pooled variance estimator takes the value 69.08. It is tested whether the population averages are equal. The corresponding test size follows, if the null hypothesis is TRUE,


    1. TRUE: A T-distribution with 25 degrees of freedom
    2. FALSE: An F-division with 12 and 15 degrees of freedom
    3. FALSE: An F-division with 11 and 14 degrees of freedom
    4. FALSE: A T distribution with 27 degrees of freedom

    1. A T-distribution with 25 degrees of freedom: Correct
    2. An F-division with 12 and 15 degrees of freedom: Incorrect
    3. An F-division with 11 and 14 degrees of freedom: Incorrect
    4. A T-division with 27 degrees of freedom: Incorrect