Statistics for Business and Economics (13th Edition)
13th Edition
ISBN: 9780134506593
Author: James T. McClave, P. George Benson, Terry Sincich
Publisher: PEARSON
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Textbook Question
Chapter 12.6, Problem 12.53LM
Minitab was used to fit the complete second-order model
E(y) = β0 + β1x1 + β2x2 + β3x1x2 + β4
to n = 39 data points. The printout is shown on the next page.
- a. Is there sufficient evidence to indicate that at least one of the parameters—β1, β2, β3, β4, and β5—is nonzero? Test using α =.05.
- b. Test H0 : β4 = 0 against Ha : β4 ≠ 0. Use α =.01.
- c. Test H0 : β5 = 0 against Ha : β4 ≠ 0. Use α =.01.
- d. Use graphs to explain the consequences of the tests in parts b and c.
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Chapter 12 Solutions
Statistics for Business and Economics (13th Edition)
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