Differential Equations: An Introduction to Modern Methods and Applications

3rd Edition

ISBN: 9781118531778

Author: James R. Brannan, William E. Boyce

Publisher: WILEY

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Textbook Question

Chapter 8.P1, Problem 2P

After viewing the results of her computer experiments, it slowly dawns on the hydrologist that the “optimal shape” of the container is consistent with what would be expected based on the conceptualization that the water in the ideal container would consist of a collection of small parcels of water of mass m , all possessing the same amount of potential energy. If laboratory spatial constraints were not an issue, what would be the ideal “shape” of each container? Perform a computer experiment that supports your conclusions based on potential energy considerations.

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Chapter 8.P1, Problem 1P

Chapter 8.P2, Problem 1P

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Suppose you fit the first-order model y = Po + B, x, + B2x2 + B3X3 + B,x4 + B5X5 + ɛ to n=28 data points and obtain SSE = 0.33 and R = 0.94. Complete parts a and b. a. Do the values of SSE and R suggest that the model provides a good fit to the data? Explain. A. Yes. Since R = 0.94 is close to 1, this indicates the model provides a good fit. Also, SSE = 0.33 is fairly small, which indicates the model provides a good fit. B. There is not enough information to decide. No. Since R = 0.94 is close to 1, this indicates the model does not provide a good fit. Also, SSE = 0.33 is fairly small, which indicates the model does not provide a good fit. b. Is the model of any use in predicting Test the null hypothesis Ho: B, = B2 = ... = B5 = 0 against the alternative hypothesis: At least of the %3D parameters B1, B2, B5 is nonzero. Use a = 0.05. The test statistic is (Round to two decimal places as needed.)

b) What are the three models proposed as extensions of the GARCH model? Describe their advantages over the GARCH.

Chapter 8 Solutions

Differential Equations: An Introduction to Modern Methods and Applications

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