Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_vufsw-testing-1102-en_vufsw-testing-1102-en
    namevufsw-testing-1102-en
    sectioninferential statistics/confidence intervals/testing
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    Typeconceptual
    ProgramNA
    LanguageEnglish
    Levelstatistical literacy

    Question

    22 randomly selected German journalists (group 1) and 20 randomly chosen Argentine journalists (group 2) were asked to rate the quality of the German team. The response scale ranges from 0 (very bad) to 10 (very good). The (fictitious) results show that the German group gives an average of 8.3 and the Argentine group gives an average of a 7.9. One researcher wants to find out whether the ratings are significantly different between the two groups. He calculates the 95% confidence interval of the difference in averages, µ1- µ2. This interval turns out to be (0.15; 0.65).

    The researcher concludes that the ratings of the two groups are significantly different from each other. From what can this be inferred?


    1. TRUE: The number 0.00 is outside the interval.
    2. FALSE: The critical t value in a two-sided test with α = 0.05 and df = 40 is 2.02. This number lies outside the interval.
    3. FALSE: The number 0.05 is outside the interval.
    4. FALSE: The number 0.95 is outside the interval.

    1. True
    2. False
    3. False
    4. False