A Man Who Moves To A New City Sees That There Are Two Routes He Could Take To Work A Neighbor Who Has Lived There A Lon 1 (15.38 KiB) Viewed 10 times
A Man Who Moves To A New City Sees That There Are Two Routes He Could Take To Work A Neighbor Who Has Lived There A Lon 2 (11.73 KiB) Viewed 10 times
A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time tells him Route A will average 5 minutes faster than Route B The man decides to experiment. Each day he flips a coin to determine which way to go, driving each route 15 days. He finds that Route A takes an average of 41 minutes, with standard deviation 3 minutes, and Route B takes an average of 43 minutes, with standard deviation 5 minutes. Histograms of travel times for the routes are roughly symmetric and show no outliers Complete parts a and b. a) Find a 95% confidence interval for the difference between the Route B and Route A commuting times, (PPA) The confidence interval is 0.0 (Round to two decimal places as needed.)
b) Should the man believe the old-timer's claim that he can save an average of 5 minutes a day by always driving Route A? Explain. because the confidence interval for the difference 5 minutes.
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!