I need help at the very bottom - Choose the correct conclusion. - Thank You!
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).
Ramp_Meters_On Ramp_Meters_Off
28 23
39 35
42 46
36 29
42 36
47 26
31 36
46 38
56 22
27 52
56 41
24 30
51 17
40 40
48 42
Does there appear to be a difference in the speeds?
A. Yes, the Meters On data appear to have higher speeds.
B. No, the box plots do not show any difference in speeds.
C. Yes, the Meters Off data appear to have higher speeds.
Are there any outliers?
A. No, there does not appear to be any outliers.
B. Yes, there appears to be a high outlier in the Meters Off data.
C. Yes, there appears to be a high outlier in the Meters On data.
D. Yes, there appears to be a low outlier in the Meters On data.
(b) Are the ramp meters effective in maintaining a higher speed on the freeway? Use the α=0.01 level of significance.
State the null and alternative hypotheses.
Choose the correct answer below.
H0:μon=μoff
H1:μon>μoff Correct Answer
Determine the P-value for this test.
P-value=0.038
(Round to three decimal places as needed.)
Choose the correct conclusion.
A.
Reject H0. There is sufficient evidence at the α=0.01level of significance that the ramp meters are effective in maintaining higher speed on the freeway.
B.
Reject H0. There is not sufficient evidence at the α=0.01level of significance that the ramp meters are effective in maintaining higher speed on the freeway.
C.
Do not reject H0. There is not sufficient evidence at the α=0.01level of significance that the ramp meters are effective in maintaining higher speed on the freeway.
D.
Do not reject H0. There is sufficient evidence at the αs=0.01level of significance that the ramp meters are effective in maintaining higher speed on the freeway.
since, p value = 0.038 >α=0.01 , fail to reject Ho
so, answer is
Do not reject H0. There is not sufficient evidence at the α=0.01level of significance that the ramp meters are effective in maintaining higher speed on the freeway
I need help at the very bottom - Choose the correct conclusion. - Thank You! Ramp...
I need help with - Are there any outliers? - thank you! 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...
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i appreciate all the help! thank you so much
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