A linear model is fit to estimate the diameter of maple trees based on age. According to the scatterplot and residual plots shown below, which of the following is true?
A) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too low.
B) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too high.
C) Re-expressing these data by taking the logarithm of age would improve this Model.
D) Both A and B.
E) Both B and C.

Question

A linear model is fit to estimate the diameter of maple trees based on age. According to the scatterplot and residual plots shown below, which of the following is true? 
A) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too low. 
B) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too high. 
C) Re-expressing these data by taking the logarithm of age would improve this Model. 
D) Both A and B. 
E) Both B and C.

Quizplus · Accepted Answer

The Answer of A linear model is fit to estimate the diameter of maple trees based on age. According to the scatterplot and residual plots shown below, which of the following is true? 
A) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too low. 
B) Assuming the pattern continues into the future, if we use this model to predict the Diameter of a maple tree that is 50 years old it would be too high. 
C) Re-expressing these data by taking the logarithm of age would improve this Model. 
D) Both A and B. 
E) Both B and C.

A Linear Model Is Fit to Estimate the Diameter of Maple