Exam 1

  1. Metainformation

    Tag Value
    fileDistributions_uva-distribution-1880-en_uva-distribution-1880-en
    nameuva-distribution-1880-en
    sectionDistributions/Continuous/t-distribution
    typeschoice
    solutionFALSE, FALSE, FALSE, TRUE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty1.731
    p-value0.8391

    Question

    From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 20, mean = 58, sd = 8.9. Sample 2: n = 12, mean = 59, sd = 12.53. The pooled variance estimator takes the value 107.73. It is tested whether the population averages are equal. The corresponding test size follows, if the null hypothesis is TRUE,


    1. FALSE: A T distribution with 32 degrees of freedom
    2. FALSE: An F-division with 20 and 12 degrees of freedom
    3. FALSE: An F-division with 19 and 11 degrees of freedom
    4. TRUE: A T distribution with 30 degrees of freedom

    1. A T-distribution with 32 degrees of freedom: Incorrect
    2. An F-division with 20 and 12 degrees of freedom: Incorrect
    3. An F-division with 19 and 11 degrees of freedom: Incorrect
    4. A T-division with 30 degrees of freedom: Correct