Travel and Transportation
Over the past several years, Times Square in New York City was made pedestrianonly, and protected bike lanes were added to five avenues in the middle of Manhattan. In addition, a new bike-share program has become extremely popular. As a result of these changes, motor vehicle traffic is actually moving more smoothly into and through Manhattan.8 One measure of better traffic flow is the speed of a taxi ride. After carefully reviewing taxi records, a random sample of similar trips before and after the changes to Times Square were obtained. The average speed (in mph) of each trip was recorded. Use the sign test with a = 0.05 to determine whether there is any evidence that the median speed of a taxi trip is faster after the changes to Times Square. Find the p value associated with this test.