Exam 1

  1. Metainformation

    Tag Value
    fileDistributions_uva-distribution-1873-en_uva-distribution-1873-en
    nameuva-distribution-1873-en
    sectionDistributions/Continuous/t-distribution
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty1.789
    p-value0.821

    Question

    From each of two normally distributed populations with equal variances a sample is drawn.______________. Sample 1: n = 14, mean = 43, sd = 8.93 Sample 2: n = 17, mean = 34, sd = 9.61. The pooled variance estimator takes the value 86.7. 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 29 degrees of freedom
    2. FALSE: An F-division with 14 and 17 degrees of freedom
    3. FALSE: A T distribution with 31 degrees of freedom
    4. FALSE: An F-division with 13 and 16 degrees of freedom

    1. A T-distribution with 29 degrees of freedom: Correct
    2. An F-division with 14 and 17 degrees of freedom: Incorrect
    3. A T-division with 31 degrees of freedom: Incorrect
    4. An F-division with 13 and 16 degrees of freedom: Incorrect