Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-independent-samples-means-45-en_uva-independent-samples-means-45-en
    nameuva-independent-samples-means-45-en
    sectionInferential Statistics/Parametric Techniques/t-test/Independent samples means
    typeschoice
    solutionTRUE, FALSE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty3.604
    p-value0.1851

    Question

    Two researchers want to know if a difference of 1 between two averages is significant. In both groups, the standard deviation is 5 and each of the groups has a sample size of 200. The null hypothesis used by the researchers, which states that the difference is equal to 0, is tested against the alternative that states that the difference is unequal to 0. It is tested with an infinite number of (∞) degrees of freedom. The null hypothesis can be rejected at


    1. TRUE: 0.05 but not at 0.02.
    2. FALSE: 0.02 but not at 0.01.
    3. FALSE: 0.01 but not at 0.002.

    1. 0.05 but not at 0.02.: Correct
    2. 0.02 but not at 0.01.: Incorrect
    3. 0.01 but not at 0.002.: Incorrect