Improving trees In the last exercise you saw that the linear model had some
Chapter 0, Problem 20(choose chapter or problem)
Improving trees In the last exercise you saw that the linear model had some deficiencies. Lets create a better model. a) Perhaps the cross-sectional area of a tree would be a better predictor of its age. Since area is measured in square units, try re-expressing the data by squaring the diameters. Does the scatterplot look better? b) Create a model that predicts Age from the square of the Diameter. c) Check the residuals plot for this new model. Is this model more appropriate? Why? d) Estimate the age of a tree 18 inches in diameter.
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