What should you do to check if the equal variance assumption (homoskedasticity) is met in a regression model?

Examine Cooks D plot.

Plot the residuals by the dependent (response) variable.

Calculate confidence interval half widths.

All answers are correct.

In a simple regression model if you do not meet assumptions how might you modify the model to meet assumptions?

Take the log of the independent variable.

Take the log of all the dependent (response) variables.

Convert the error terms using antilogs.

None of the answers will work.