Top Posters
Since Sunday
5
o
5
4
m
4
b
4
x
4
a
4
l
4
t
4
S
4
m
3
s
3
New Topic  
meganA meganA
wrote...
Posts: 448
4 years ago
Maple trees A forester would like to know how big a maple tree might be at age 50 years. She gathers data from some trees that have been cut down, and plots the diameters (in inches) of the trees against their ages (in years). First she makes a linear model. The scatterplot and residuals plot are shown.


a. Describe the association shown in the scatterplot.
b. Do you think the linear model is appropriate? Explain.
c. If she uses this model to try to predict the diameter of a 50-year old maple tree, would you expect that estimate to be fairly accurate, too low, or too high? Explain.

Now she re-expresses the data, using the logarithm of age to try to predict the diameter of the tree. Here are the regression analysis and the residuals plot.

d. Explain why you think this is a better model.
e. Using this model, predict the diameter of a maple tree at age 50 years.
Textbook 
Stats: Modeling the World

Stats: Modeling the World


Edition: 4th
Authors:
Read 102 times
1 Reply
Replies
Answer verified by a subject expert
rinderbikrinderbik
wrote...
Posts: 391
4 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
This verified answer contains over 570 words.
1

Related Topics

meganA Author
wrote...

4 years ago
Smart ... Thanks!
wrote...

Yesterday
This site is awesome
wrote...

2 hours ago
this is exactly what I needed
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  915 People Browsing
 113 Signed Up Today
Related Images
  
 241
  
 4415
  
 1001
Your Opinion
What's your favorite coffee beverage?
Votes: 274