Question

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 28 47 56 37 31 25 43 47 50 35 54 40 42 26 48

Ramp Meters Off 23 27 42 33 37 32 46 37 19 28 23 39 38 52 42

Determine the​ P-value for this test.

​P-valueequals=

​(Round to three decimal places as​ needed.)

Answer 1

thank you.