For each of the following, state whether you'd use one-sample or two-sample procedures to analyze the data, and explain why.

D. You want to know if there's a difference between the time it takes you to get
to school on the bus and the time it takes you to get to school when you get a
ride from a friend. Over a semester, you flip a coin to decide whether you'll
take the bus or get a ride. You record your travel time daily.