Using Python and the Pandas package, I created a data frame and reduced the fields to the hour and age of rider. For testing purposes, the time and age fields were divided into two groups. For ride times, they were the following: daytime rides, consisting of rides initiated between 5:00 AM and 11:59 P.M.; and nighttime rides, consisting of rides initiated between 12:00 A.M. and 4:59 A.M. For age, the groups were the following: riders 35 years old or older ("older riders"); and riders younger than 35 ("younger riders").