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In a simulation of 30 mobile computer networks, the average speed, pause time, and number of neighbors were measured. A “neighbor" is a computer within the transmission range of another. The data are presented in the following table. Neighbors Speed Pause Neighbors Speed Pause Neighbors Speed Pause 10.17 0 9.36 5 10 8.92 5 20 8.30 5 40 8.00 5 8.86 10 10 8.28 8.46 10.20 7.93 10.17 7.73 10 40 7.56 8.24 20 10 7.78 7.44 7.30 20 40 7.21 10.19 7.91 30 10 7.45 7.14 30 40 7.08 7.30 10.18 7.72 40 10 7.32 7.10 7.05 40 40 6.00 5500888899 10 10 20 30 40 10 30 0 20 10 10 20 20 30 30 40 40 50 20 50 20 50 20 50 20 50

In a simulation of 30 mobile computer networks, the average speed, pause time, and number of neighbors were measured. A “neighbor" is a computer within the transmission range of another. The data are presented in the following table. Neighbors Speed Pause Neighbors Speed Pause Neighbors Speed Pause 10.17 0 9.36 5 10 8.92 5 20 8.30 5 40 8.00 5 8.86 10 10 8.28 8.46 10.20 7.93 10.17 7.73 10 40 7.56 8.24 20 10 7.78 7.44 7.30 20 40 7.21 10.19 7.91 30 10 7.45 7.14 30 40 7.08 7.30 10.18 7.72 40 10 7.32 7.10 7.05 40 40 6.00 5500888899 10 10 20 30 40 10 30 0 20 10 10 20 20 30 30 40 40 50 20 50 20 50 20 50 20 50

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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3. In a simulation of 30 mobile computer networks, the average speed, pause time, and number of neighbors were measured. A "neighbor" is a computer within the transmission range of another. The data are presented in the following table. Neighbors Speed Pause Neighbors Speed Pause Neighbors Speed Pause 10.17 5 0 9.36 5 10 8.92 5 20 8.46 5 30 8.30 5 40 8.00 5 50 10.20 10 8.86 10 10 8.28 10 20 7.93 10 30 7.73 10 40 7.56 10 50 10.17 20 0 8.24 20 10 7.78 20 20 7.44 20 30 7.30 20 40 7.21 20 50 10.19 30 0 7.91 30 10 7.45 30 20 7.30 30 30 7.14 30 40 7.08 30 50 10.18 40 7.72 40 10 7.32 40 20 7.19 40 30 7.05 40 40 6.99 40 50 a. Fit the model with Neighbors as the dependent variable, and independent variables Speed, Pause, Speed. Pause, Speed², and Pause²2 b. Construct a reduced model by dropping any variables whose P-values are large, and test the plausibility of the model with an F test. c. Plot the residuals versus the fitted values for the reduced model. Are there any indications that the model is inappropriate? If so, what are they? d. Someone suggests that a model containing Pause and Pause2 as the only dependent variables is adequate. Do you agree? Why or why not?
Transcribed Image Text:3. In a simulation of 30 mobile computer networks, the average speed, pause time, and number of neighbors were measured. A "neighbor" is a computer within the transmission range of another. The data are presented in the following table. Neighbors Speed Pause Neighbors Speed Pause Neighbors Speed Pause 10.17 5 0 9.36 5 10 8.92 5 20 8.46 5 30 8.30 5 40 8.00 5 50 10.20 10 8.86 10 10 8.28 10 20 7.93 10 30 7.73 10 40 7.56 10 50 10.17 20 0 8.24 20 10 7.78 20 20 7.44 20 30 7.30 20 40 7.21 20 50 10.19 30 0 7.91 30 10 7.45 30 20 7.30 30 30 7.14 30 40 7.08 30 50 10.18 40 7.72 40 10 7.32 40 20 7.19 40 30 7.05 40 40 6.99 40 50 a. Fit the model with Neighbors as the dependent variable, and independent variables Speed, Pause, Speed. Pause, Speed², and Pause²2 b. Construct a reduced model by dropping any variables whose P-values are large, and test the plausibility of the model with an F test. c. Plot the residuals versus the fitted values for the reduced model. Are there any indications that the model is inappropriate? If so, what are they? d. Someone suggests that a model containing Pause and Pause2 as the only dependent variables is adequate. Do you agree? Why or why not?
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