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Multiple choice questions

Which of the following statistical tests allows causal inferences to be made? 

Answer choices

  1. Analysis of variance
  2. Regression
  3. None of these, it’s the design of the research that determines whether causal inferences can be made.
  4. t-test

Answer: None of these, it’s the design of the research that determines whether causal inferences can be made

R2 is known as the:

Answer choices

  1. Coefficient of determination.
  2. Multiple correlation coefficient.
  3. Partial correlation coefficient.
  4. Semi-partial correlation coefficient.

Answer: Coefficient of determination

Which of the following statements about outliers is not true?

Answer choices

  1. Outliers are values very different from the rest of the data.
  2. Influential cases will always show up as outliers.
  3. Outliers have an effect on the mean.
  4. Outliers have an effect on regression parameters.

Answer: Influential cases will always show up as outliers

For which regression assumption does the Durbin–Watson statistic test?

Answer choices

  1. Linearity
  2. Homoscedasticity
  3. Multicollinearity
  4. Independence of errors

Answer: Independence of errors

What is b0 in regression analysis? 

Answer choices

  1. The value of the outcome when all of the predictors are 0.
  2. The relationship between a predictor and the outcome variable.
  3. The value of the predictor variable when the outcome is zero.
  4. The gradient of the regression line.

Answer: The value of the outcome when all of the predictors are 0