Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-simple-linear-regression-99-en_uva-simple-linear-regression-99-en
    nameuva-simple-linear-regression-99-en
    sectionInferential Statistics/Regression/Simple linear regression
    typeschoice
    solutionFALSE, FALSE, TRUE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty4.671
    p-value0.0134

    Question

    Given is a table of correlations for three predictors x1, x2 and x3.

    —— —— —— x1 x2 x3 x1 x2 0.01 x3 0.35 0.05 —— —— ——

    The regression equation for the dependent variable y is with only x1 and x3:†. * y = 23.13 + 12.17 x1 + 2.10 x3. Now suppose the model is calculated with x2 added. Then the coefficient


    1. FALSE: From x1 become much smaller and from x3 much larger.
    2. FALSE: From x1 remain about the same and from x3 become much smaller.
    3. TRUE: From x1 remain about the same and from x3 also.

    1. From x1 become much smaller and from x3 much larger…: Incorrect
    2. From x1 remain about the same and from x3 become much smaller: Incorrect
    3. From x1 remain about the same and from x3 also: Correct