Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-intercept-124-en_uva-intercept-124-en
    nameuva-intercept-124-en
    sectionInferential Statistics/Regression/Intercept
    typeschoice
    solutionFALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty3.145
    p-value0.2584

    Question

    A regression is done with two independent variables x1 and x2 which together should explain the dependent variable y. To represent the regression in a figure, for some values of x2 the regression with only x1 is recalculated over and over again and put into the figure. In this figure there are two such separate regression lines with the values for x2 of 2 and 5: What assumption of multiple regression for testing for coefficients is here probably being violated here?


    1. FALSE: There is a linear relationship between y and each of the independent variables.
    2. TRUE: The coefficient of direction is the same for all combinations of other independent variables.
    3. FALSE: The population standard deviation is the same for all combinations of independent variables.

    1. There is a linear relationship between y and each of the independent variables…: Incorrect
    2. The directional coefficient is the same for all combinations of other independent variables…: Correct
    3. The population standard deviation is the same for all combinations of independent variables…: Incorrect