Draw the scatterplot of Lab versus Field, and comment on the applicability of the simple linear regression model. Fit the simple regression model, get the residual plot, and summarize. Explain why the...

Draw the scatterplot of Lab versus Field, and comment on the applicability of the simple linear regression model.

Fit the simple regression model, get the residual plot, and summarize. Explain why the plot suggests non-constant variance and provide a test for non-constant variance.