MANOVA Multivariate Tests

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Questions and Answers

What is the primary advantage of using ANOVA over multiple t-tests when comparing means between multiple groups?

  • ANOVA is only used for metric variables
  • ANOVA is only used for categorical variables
  • ANOVA is less sensitive to Type I errors (correct)
  • ANOVA is more sensitive to Type I errors

In a mixed-design ANOVA, what is the combination of conditions?

  • Between-groups and multivariate
  • Between-groups and one-way
  • Between-groups and within-groups (correct)
  • Within-groups and one-way

What is the purpose of the F statistic in ANOVA?

  • To determine if there is a significant effect of the categorical variables on the metric variable (correct)
  • To determine the effect size of the mean difference
  • To determine the direction of the relationship between variables
  • To determine the significance of the interaction between variables

What is the ideal scenario for running ANOVA in terms of participants?

<p>Equal numbers of participants in each group (D)</p> Signup and view all the answers

What is the term for the error of failing to find a significant difference where one does in fact exist in reality?

<p>Type II error (B)</p> Signup and view all the answers

What is the purpose of the partial η2 (partial eta squared) in ANOVA?

<p>To determine the effect size of the mean difference (D)</p> Signup and view all the answers

What is the term for the error of finding a significant difference where one does not exist in reality?

<p>Type I error (B)</p> Signup and view all the answers

What type of ANOVA is conducted on one independent variable?

<p>One-way ANOVA (B)</p> Signup and view all the answers

What is the purpose of Levene's test in ANOVA?

<p>To test the homogeneity of variance (D)</p> Signup and view all the answers

What is the advantage of using multivariate tests in ANOVA?

<p>To test the effect of multiple dependent variables simultaneously (B)</p> Signup and view all the answers

What is the purpose of including Mean Square Error (MSE) in an ANOVA?

<p>To provide an estimate of the statistical error present in the ANOVA (A)</p> Signup and view all the answers

What is the primary difference between ANOVA and ANCOVA?

<p>The control for another metric dependent variable (A)</p> Signup and view all the answers

In MANOVA, what is the assumption of homogeneity related to?

<p>The variance / covariance matrix (D)</p> Signup and view all the answers

What is the purpose of running a multivariate test such as MANOVA?

<p>To look for mean differences in multiple dependent variables (A)</p> Signup and view all the answers

What is the primary advantage of using MANOVA over running multiple ANOVA?

<p>It provides a quick way to run multiple ANOVA without thinking about the relationships between the dependent variables (C)</p> Signup and view all the answers

What is the Levene's test used for in the context of MANOVA?

<p>To test for homogeneity of the variance / covariance matrix (D)</p> Signup and view all the answers

What is the purpose of estimated marginal means in MANOVA?

<p>To display the means for each level of the independent variables (D)</p> Signup and view all the answers

When testing for specific effects in MANOVA, what is the purpose of the Post Hoc option?

<p>To follow up on significant interactions or main effects (D)</p> Signup and view all the answers

What is the primary limitation of interpreting complex MANOVA designs?

<p>The difficulty in interpreting complex graphs (C)</p> Signup and view all the answers

What is the purpose of the Descriptive statistics option in MANOVA?

<p>To provide a summary of the means and standard deviations of the dependent variables (D)</p> Signup and view all the answers

What is the purpose of conducting the F test assessing Box's M?

<p>To ensure the assumption of homogeneity of variances is met (C)</p> Signup and view all the answers

What is the main outcome of a MANOVA?

<p>Results indicating group differences in dependent variables (A)</p> Signup and view all the answers

What do estimated marginal means aim to control for in ANOVA?

<p>Independent variables (D)</p> Signup and view all the answers

What is the primary difference between planned contrasts and post hoc testing?

<p>Timing of conducting the tests (B)</p> Signup and view all the answers

Which type of contrast is often used in ANOVA designs to compare each group to a baseline group?

<p>Simple contrasts (B)</p> Signup and view all the answers

What do Tukey's test and Student-Newman-Keuls (SNK) testing primarily differ in?

<p>Control of Type I statistical errors (A)</p> Signup and view all the answers

Which statistical test aims to ensure equality of variances in ANOVA?

<p>Levene's test (A)</p> Signup and view all the answers

What does an interaction term in ANOVA represent?

<p>Multiplicative effect of independent variables (D)</p> Signup and view all the answers

How do estimated marginal means differ from raw means in ANOVA?

<p>Control for other variables (D)</p> Signup and view all the answers

When is it appropriate to use complex polynomial contrasts in ANOVA?

<p>When comparing multiple groups simultaneously (B)</p> Signup and view all the answers

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