Please help on 11

Question 11 0/1 pt 9 10 99 0 Details 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 in Sacramento, CA conducted an experiment in which a section of freeway had ramp meters installed on the on-ramps. The speed of the vehicles was collected. A random sample of 34 cars on the highway for a Monday at 6:00PM with the ramp meters on found a mean speed of 30.7 MPH with a standard deviation of 15.6 MPH. A second random sample of 28 cars on a different Monday at 6:00PM with meters off resulted in mean speed of 28.9 MPH with a standard deviation of 18.5 MPH. Test the claim that the mean speed of vehicles with metering on is the same as the mean speed of vehicles with metering off at the 0.01 significance level. Claim: Select an answer | which corresponds to |Select an answer v Opposite: Select an answer v | which corresponds to |Select an answer v The test is: |Select an answer v The test statistic is: t = (to 3 decimals) The critical value is: + (to 3 decimals) Based on this we: Select an answer Conclusion There Select an answer | appear to be enough evidence to support the claim that the mean speed of vehicles with metering on is the same as the mean speed of vehicles with metering off. Submit