Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-test-123-en_uva-test-123-en
    nameuva-test-123-en
    sectionInferential Statistics/Parametric Techniques/t-test
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty4.034
    p-value0.1073

    Question

    In a study of the difference between having or not having a time limit in solving problems, 28 subjects are examined. Each subject completes both a set of (similar) problems with and without a time limit. The score on the test is approximately normally distributed. Then difference scores are calculated with mean 3.21 and variance 2.53. The null hypothesis is that there is no difference between having or not having a time limit, and the alternative hypothesis that there is a difference. There is no good idea about which way the effect goes. When tested, the null hypothesis


    1. TRUE: Be rejected at 1%
    2. FALSE: Not be rejected at 1% but be rejected at 5%.
    3. FALSE: Not be rejected at 5% but be rejected at 10%.
    4. FALSE: Not be rejected at 10% but be rejected at 20%.

    1. Are rejected at 1%: Correct
    2. Not be rejected at 1% but be rejected at 5%…: Incorrect
    3. Not be rejected at 5% but be rejected at 10%…: Incorrect
    4. Not be rejected at 10% but be rejected at 20%…: Incorrect