Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_vufsw-intercept-0224-en_vufsw-intercept-0224-en
    namevufsw-intercept-0224-en
    sectioninferential statistics/regression/intercept
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    Typeconceptual
    ProgramNA
    LanguageEnglish
    Levelstatistical literacy

    Question

    Suppose we conducted a survey and estimated a regression model to examine what factors influence mental health among employees influence. It is predicted that high psychological demands, lack of control over work, and lack of social support at work all reduce mental health.

    We measure “mental health” (Y) on a scale of 0-100, where a higher score means better mental health. For the characteristics of the job a person has, we distinguish between “psychological demands” (X1), “lack of control” (X2) and “lack of of social support” (X3). We measure each independent variable on a scale from 0 (low on this characteristic) to 4 (high on this characteristic).

    We find the regression equation below.

    What is the intercept (the constant) and how should you interpret this number interpret this number?


    1. TRUE: The intercept = 61. This is the predicted mental health if the job of the person scores 0 on psychological demands, 0 scores on lack of control over the job, and 0 scores on lack of social support.
    2. FALSE: The intercept = (61-13-9-3=) 36. This is the predicted mental health if the person’s job scores 0 on psychological demands, 0 scores on lack of control over the job, and 0 scores on lack of social support.
    3. FALSE: The intercept = 61. This is a meaningless number and is only included in the regression equation for mathematical reasons.
    4. FALSE: The intercept = (61-13-9-3=) 36. This is a meaningless number and is included in the regression equation only for mathematical reasons.

    1. True
    2. False
    3. False
    4. False