Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-confidence-level-858-en_uva-confidence-level-858-en
    nameuva-confidence-level-858-en
    sectionInferential Statistics/Confidence Intervals/Confidence level
    typeschoice
    solutionFALSE, FALSE, TRUE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty4.463
    p-value0.0222

    Question

    It examines how many people would answer yes when asked whether they ever feel depressed. The percentage who answered with “yes. answers is 33% from a sample of 350 randomly asked people. The researchers want to know if the percentage exceeds 30%. To that end they set the null hypothesis at H0: p0 = 30%. From what percentage can the null hypothesis be rejected when a significance level is used of 2.5%?


    1. FALSE: 25%
    2. FALSE: 30%
    3. TRUE: 35%

    1. 25%: Incorrect
    2. 30%: Incorrect
    3. 35%: Correct