Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-inferential-statistics-92-en_uva-inferential-statistics-92-en
    nameuva-inferential-statistics-92-en
    sectionInferential Statistics
    typeschoice
    solutionFALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty-0.337
    p-value0.9355

    Question

    Research on the effect of drug A on schizophrenic patients yields a positive correlation between the dose (x) of drug A and how well the patient feels (y). The test on the slope parameter indicates that the relationship is significant. The researchers note that there are three different age groups of patients: 21-25, 26-30 and 31-35 years. The researchers conduct a separate regression analysis. It then turns out that for each of these three groups, there is a negative correlation between the dose of drug A and how well the patient feels. This is an example of


    1. FALSE: Regression to the mean.
    2. TRUE: Simpson’s paradox.
    3. FALSE: Bivariate correlation.

    1. Regression to the mean..: Incorrect
    2. Simpson’s paradox: Correct
    3. Bivariate correlation…: Incorrect