MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Full Data Set O Ramp Meters Off 27 Ramp Meters On 28 47 57 24 43 39 32 26 35 36 31 43 45 50 48 38 19 35 55 41 28 23 41 42 25 46 38 52 42
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Transcribed Image Text:Full Data Set O Ramp Meters Off 27 Ramp Meters On 28 47 57 24 43 39 32 26 35 36 31 43 45 50 48 38 19 35 55 41 28 23 41 42 25 46 38 52 42
Ramp metering is a traffic engineering idea that requires cars entering a freeway to stop for a certain period of time before joining the traffic flow. The theory is that ramp metering controls the number of cars on the freeway and the number of cars accessing the freeway, resulting in a freer flow of cars, which ultimately results in faster travel times. To test whether ramp metering is effective in reducing travel times, engineers conducted an experiment in which a section of freeway had ramp meters installed on the on-ramps. The response variable for the study was speed of the vehicles. A random sample of 15 cars on the highway for a Monday at 6 p.m. with the ramp meters on and a second random sample of 15 cars on a different Monday at 6 p.m. with the meters off resulted in the following speeds (in miles per hour). E Click the icon to view the data sets. (a) Draw side-by-side boxplots of each data set. Does there appear to be a difference in the speeds? Are there any outliers? Choose the correct box plot below. B. OA. Off- Off- Off On On 15 60 30 MPH 15 30 45 60 15 30 MPH 45 60 MPH Does there appear to be a difference in the speeds? O A. Yes, the Meters Off data appear to have higher speeds. O B. No, the box plots do not show any difference in speeds. CC. Yes, the Meters On data appear to have higher speeds. Are there any outliers? CA. No, there does not appear to be any outliers. O B. Yes, there appears to be a low outlier in the Meters On data. O C. Yes, there appears to be a high outlier in the Meters On data. O D. Yes, there appears to be a high outlier in the Meters Off data. (b) Are the ramp meters effective in maintaining a higher speed on the freeway? Use the a= 0.01 level of significance. State the null and alternative hypotheses. Choose the correct answer below. OA. H,PO Hoff H, Pon Hoff OB. Ho Hon - Poff H Hon *Poff C. Hoton Hoff H Fon Hoff OD. Ho Pon Hoff H, PonHoff Determine the P-value for this test. P-value = (Round to three decimal places as needed.)
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Transcribed Image Text:Ramp metering is a traffic engineering idea that requires cars entering a freeway to stop for a certain period of time before joining the traffic flow. The theory is that ramp metering controls the number of cars on the freeway and the number of cars accessing the freeway, resulting in a freer flow of cars, which ultimately results in faster travel times. To test whether ramp metering is effective in reducing travel times, engineers conducted an experiment in which a section of freeway had ramp meters installed on the on-ramps. The response variable for the study was speed of the vehicles. A random sample of 15 cars on the highway for a Monday at 6 p.m. with the ramp meters on and a second random sample of 15 cars on a different Monday at 6 p.m. with the meters off resulted in the following speeds (in miles per hour). E Click the icon to view the data sets. (a) Draw side-by-side boxplots of each data set. Does there appear to be a difference in the speeds? Are there any outliers? Choose the correct box plot below. B. OA. Off- Off- Off On On 15 60 30 MPH 15 30 45 60 15 30 MPH 45 60 MPH Does there appear to be a difference in the speeds? O A. Yes, the Meters Off data appear to have higher speeds. O B. No, the box plots do not show any difference in speeds. CC. Yes, the Meters On data appear to have higher speeds. Are there any outliers? CA. No, there does not appear to be any outliers. O B. Yes, there appears to be a low outlier in the Meters On data. O C. Yes, there appears to be a high outlier in the Meters On data. O D. Yes, there appears to be a high outlier in the Meters Off data. (b) Are the ramp meters effective in maintaining a higher speed on the freeway? Use the a= 0.01 level of significance. State the null and alternative hypotheses. Choose the correct answer below. OA. H,PO Hoff H, Pon Hoff OB. Ho Hon - Poff H Hon *Poff C. Hoton Hoff H Fon Hoff OD. Ho Pon Hoff H, PonHoff Determine the P-value for this test. P-value = (Round to three decimal places as needed.)
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