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How much noisier are streets where cars travel faster? The article "Modeling of Urban Area Stop-and-Go Traffic Noise" (P. Pamanikabud and C. Tharasawatpipat, Journal of Transportation Engineering, 1999:152–159) reports noise levels in decibels and average speed in kilometers per hour for a sample of roads. The following table presents the results. Speed Noise 28.26 78.1 36.22 79.6 38.73 81.0 29.07 78.7 30.28 78.6 30.25 78.5 29.03 78.4 33.17 79.6 Compute the least-squares line for predicting noise level (y) from speed (x). b. Compute the erTor standard deviation estimate s. Construct a 95% confidence interval for the slope. Find a 95% confidence interval for the mean noise level for streets whose average speed is 30 kilometers per hour. Can you conclude that the mean noise level for streets whose average speed is 30 kilometers per hour is greater than 78 decibels? Perform a hypothesis test and report a. C. d. e. the P-value. f. Find a 95% prediction interval for the mean noise level for streets whose average speed is 30 kilometers per hour.

How much noisier are streets where cars travel faster? The article "Modeling of Urban Area Stop-and-Go Traffic Noise" (P. Pamanikabud and C. Tharasawatpipat, Journal of Transportation Engineering, 1999:152–159) reports noise levels in decibels and average speed in kilometers per hour for a sample of roads. The following table presents the results. Speed Noise 28.26 78.1 36.22 79.6 38.73 81.0 29.07 78.7 30.28 78.6 30.25 78.5 29.03 78.4 33.17 79.6 Compute the least-squares line for predicting noise level (y) from speed (x). b. Compute the erTor standard deviation estimate s. Construct a 95% confidence interval for the slope. Find a 95% confidence interval for the mean noise level for streets whose average speed is 30 kilometers per hour. Can you conclude that the mean noise level for streets whose average speed is 30 kilometers per hour is greater than 78 decibels? Perform a hypothesis test and report a. C. d. e. the P-value. f. Find a 95% prediction interval for the mean noise level for streets whose average speed is 30 kilometers per hour.

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
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How much noisier are streets where cars travel faster? The article "Modeling of Urban Area Stop-and-Go Traffic Noise" (P. Pamanikabud and C. Tharasawatpipat, Journal of Transportation Engineering, 1999:152–159) reports noise levels in decibels and average speed in kilometers per hour for a sample of roads. The following table presents the results. Speed Noise 28.26 78.1 36.22 79.6 38.73 81.0 29.07 78.7 30.28 78.6 30.25 78.5 29.03 78.4 33.17 79.6 Compute the least-squares line for predicting noise level (y) from speed (x). b. Compute the erTor standard deviation estimate s. Construct a 95% confidence interval for the slope. Find a 95% confidence interval for the mean noise level for streets whose average speed is 30 kilometers per hour. Can you conclude that the mean noise level for streets whose average speed is 30 kilometers per hour is greater than 78 decibels? Perform a hypothesis test and report a. C. d. e. the P-value. f. Find a 95% prediction interval for the mean noise level for streets whose average speed is 30 kilometers per hour.
Transcribed Image Text:How much noisier are streets where cars travel faster? The article "Modeling of Urban Area Stop-and-Go Traffic Noise" (P. Pamanikabud and C. Tharasawatpipat, Journal of Transportation Engineering, 1999:152–159) reports noise levels in decibels and average speed in kilometers per hour for a sample of roads. The following table presents the results. Speed Noise 28.26 78.1 36.22 79.6 38.73 81.0 29.07 78.7 30.28 78.6 30.25 78.5 29.03 78.4 33.17 79.6 Compute the least-squares line for predicting noise level (y) from speed (x). b. Compute the erTor standard deviation estimate s. Construct a 95% confidence interval for the slope. Find a 95% confidence interval for the mean noise level for streets whose average speed is 30 kilometers per hour. Can you conclude that the mean noise level for streets whose average speed is 30 kilometers per hour is greater than 78 decibels? Perform a hypothesis test and report a. C. d. e. the P-value. f. Find a 95% prediction interval for the mean noise level for streets whose average speed is 30 kilometers per hour.
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