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Create a model that predicts age from the square of diameter

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Reference no: EM131646727

Question: Improving trees. In the last exercise you saw that the linear model had some deficiencies. Let's 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.

Reference no: EM131646727

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