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Experimental Design and Sample Size
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Experimental Design and Sample Size

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Questions and Answers

What is the primary purpose of correlational research?

  • To examine the effect of a single independent variable on a dependent variable
  • To compare the means of two or more groups
  • To identify naturally occurring relationships between variables (correct)
  • To establish cause-and-effect relationships between variables

    • What is the main advantage of within-subjects designs?

  • They can be used to establish cause-and-effect relationships
  • They are more cost-effective than between-subjects designs
  • They control for individual differences between participants (correct)
  • They allow for the comparison of means between groups

    • What is the purpose of using a summary measure to assess the fit of a model?

  • To select the most parsimonious model
  • To identify the most important predictor variable
  • To evaluate the degree to which the model explains the data (correct)
  • To determine the statistical significance of the model

    • What is the term for the variable being predicted in a regression analysis?

    <p>Dependent variable</p> Signup and view all the answers

    What is the main difference between laboratory and field research?

    <p>Laboratory research has greater control over extraneous variables</p> Signup and view all the answers

    What is the term for the difference between the data and the model?

    <p>Residual</p> Signup and view all the answers

    What is the purpose of counterbalancing in within-subjects designs?

    <p>To control for sequencing effects</p> Signup and view all the answers

    What is the term for the statistical test used to compare the means of two groups?

    <p>t-test</p> Signup and view all the answers

    What is the advantage of using a factorial design?

    <p>It allows for the examination of interaction effects between independent variables</p> Signup and view all the answers

    What is the term for the representation of a multivariate model in matrix form?

    <p>Y = Xb + e</p> Signup and view all the answers

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