Citibike is a shared bicycle transportation system. One has to subscribe to be able to use the system. Bicycles could be docked at starting and ending stations. My question was trying to study trip patterns that centers around the age group of 20 to 40 years old. I wanted to know if people in this age group were more likely than others to take longer trips of duration which is more than half an hour. Based on my results, the hypothesis that the age group in question rode more than half an hour more frequently was rejected. My question was mainly focused on this age group because, if the hypothesis were not rejected we could make recommendations for improving citibike service that involved this slice of the bicycle riding population.