Physical Sciences
The U.S. Geological Survey recently completed a national assessment of geologic carbon dioxide storage resources.22 A random sample of formations was obtained, and the area of each formation (x, in thousands of acres) and the depth from the surface (y, in thousands of feet) was obtained for each.
a. Construct a scatter plot of these data. Describe the relationship between these two variables.
b. Compute the sample correlation coefficient. Does this value support your answer in part (a)? Why or why not?
c. Using the results in parts (a) and (b), do you believe the relationship between these two variables is significant? Why or why not?
d. Find the estimated regression line and conduct an F test for a significant regression. Use a = 0.05. Does your conclusion support your answer in part (c)?