Statistical Methods MCQ'S ANCOVA, MANOVA and Regression/Correlation

1. A psychologist finds in their regression that N/M is very small. Why is this a problem?

  • Results could be meaningless
  • Results might lack reliability
  • Results could have too much power
  • Results could not be replicable
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2. In order to work out the f-ratio for a regression, we need MSm and MSr. How do we work out MSm?

  • MSm = dfm/SSr (Degree's of Freedom Model/ Residual Sum of Squares) Remember, the degree's of freedom for the model are the amount of variables in the model.
  • MSm = SSm/dfm (Model Sum of Squares / Degree's of Freedom Model) Remember, dam is simply the number of variables in the model.
  • MSm = dfm/MSm (Degree's of Freedom Model/ Model Mean Squares) Remember, model mean squares is the amount of variables in the model.
  • MSm = SSr/dfr (Residual Sum of Squares / Residual Degree's of Freedom) Remember, residual degrees of freedom is the amount of variables in the model.

3. Why do we use basic ratios?

  • To simplify the calculation of Sum of Squares
  • To simplify the calculation of F-Critical
  • To help an ANOVA partition
  • To calculate figures for the F-table

4. What does a Discriminant Functions Analysis (DFA) look to do?

  • It aims to find a set of variables that create a statistically discriminant functionality
  • It aims to find a set of variables that give a direction of the main effect
  • It aims to find a set of variables that predict membership of groups
  • It aims to find a set of variables that are hidden outliers in the analysis

5. A venn diagram is created depicting the relationship between altruism (D.V) and Agreeableness (I.V) and Happiness (I.V). Happiness is the largest circle. What does this suggest?

  • it correlates highly with Altruism and Agreeableness
  • It has the largest level of residuals
  • It has the largest variance
  • It has the smallest variance

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