Intro Stats + New Mylab Statistics With Pearson Etext:
5th Edition
ISBN: 9780134210230
Author: De Veaux, Richard D.
Publisher: Pearson College Div
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Textbook Question
Chapter R, Problem 2.23RE
How old is that tree? One can determine how old a tree is by counting its rings, but that requires either cutting the tree down or extracting a sample from the tree’s core. Can we estimate the tree’s age simply from its diameter? A forester measured 27 trees of the same species that had been cut down, and counted the rings to determine the ages of the trees.
- a) Find the
correlation between Diameter and Age. Does this suggest that a linear model may be appropriate? Explain. - b) Create a
scatterplot and describe the association. - c) Create the linear model.
- d) Check the residuals. Explain why a linear model is probably not appropriate.
- e) If you used this model, would it generally overestimate or underestimate the ages of very large trees? Explain.
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Chapter R Solutions
Intro Stats + New Mylab Statistics With Pearson Etext:
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