Exercise

Question 5

Use residual plots to evaluate whether the conditions of least squares regression are reasonable. Which of the following statements is an incorrect analysis of the residual plots and conditions?

Note: The linear model m_bty is still loaded in the workspace.

Instructions

50 XP

Possible answers

Linear association: The residuals plot shows a random scatter.

Constant variance of residuals: No fan shape in residuals plot.

Nearly normal residuals: Residuals are right skewed, but the sample size is large, so this may not be an important violation of conditions.

Independent observations: Classes sampled randomly, no order effect.