Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_vufsw-confidenceintervals-0142-en_vufsw-confidenceintervals-0142-en
    namevufsw-confidenceintervals-0142-en
    sectioninferential statistics/confidence intervals
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE, FALSE, FALSE
    Typeconceptual
    ProgramNA
    LanguageEnglish
    Levelstatistical literacy

    Question

    Suppose a researcher administered to 102 employees of a large company a questionnaire that surveyed how they rated their supervisor rating. The scores ranged from 0 (very negative) to 5 (very positive). It is tested whether people with a permanent contract ______[group 2; n=51] rate their supervisor more positively than those with a temporary contract (group 1; n=51). He calculates the 95% confidence interval of the difference in averages, µ1 - µ2. This interval turns out to be µ[-0.03; 0.08] are.

    Do the mean ratings of the two groups differ significantly from each other? We test two-sided and use a significance level of 5%. And from what can this conclusion be derived?


    1. FALSE: Yes, because the number 0.00 lies within the interval.
    2. TRUE: No, because the number 0.00 lies within the interval.
    3. FALSE: No, because the number 0.025 lies within the interval.
    4. FALSE: No, because the number 0.05 lies within the interval.
    5. FALSE: Yes, because the number 0.025 lies within the interval.
    6. FALSE: Yes, because the number 0.05 lies within the interval.

    1. False
    2. True
    3. False
    4. False
    5. False
    6. False