Dr. Jeremy Groves, a British anaesthetist, often uses a bicycle for his 27-mile round-trip commute to work. He bought an expensive, lightweight, carbon bike but also had an older, heavier, steel bike—so he decided to do an experiment. On each day he biked to work he flipped a coin to determine which bike he would ride. He used a bicycle computer to accurately record the commute time each day as well as his maximum and average speed for the day. His data for 56 days are stored in BikeCommute. The type of bicycle (carbon or steel) is in the Bike variable and his time (in minutes) is stored in Minutes. Do the data provide evidence that mean commute time differs between the two types of bikes?