Refer to Exercise 12.13. Fit a cubic model to the data, and then answer the following questions.
Question:
a. Can the hypothesis of no overall predictive value be rejected at the a 5 0.01 level? Justify your answer.
b. Test the research hypothesis H0: b3 = 0 at the α = 0.05 level. Report the p- value of the test.
c. Based on the results of the test in part (b), display the estimated regression model.
d. Plot the data along with the best- fitting estimated regression line.
In exercise
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Related Book For
An Introduction To Statistical Methods And Data Analysis
ISBN: 9781305465527
7th Edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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