Refer to the data on annual mortgage interest rate (Yt), Exercise 14.41. You fit the simple linear
Question:
a. Find and plot the regression residuals against t. Does the plot suggest the presence of autocorrelation? Explain.
b. Conduct the Durbin-Watson test (at α = .05) to test formally for the presence of positively auto-correlated regression errors.
c. Comment on the validity of the inference concerning model adequacy in light of the result of part b.
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Statistics For Business And Economics
ISBN: 9780134506593
13th Edition
Authors: James T. McClave, P. George Benson, Terry Sincich
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