Citi Bike is the largest bike sharing system in the U.S. The dataset contains information about all trips performed using Citi Bike and provides a very comprehensive data for studying NYC citizens’ behavior through patterns in its cycling activity. By producing the investigation of Citi Bike data with Chi-square test of proportions and reproducible mechanism, the result shows that the ratio of subscribers, i.e. Annual Pass holders, biking on weekends over weekdays is less than the ratio of customers, i.e. 1-Day/3-Day Pass users, biking on weekends over weekdays. Therefore, we derive that customers are less likely than subscribers to choose biking for commuting.

Acknowledgements

We took our own advice and sought feedback from a large number of colleagues throughout the process of preparing this paper. We would like to especially thank the following people who gave particularly detailed and useful feedback:
Sandra Aamodt, Misha Ahrens, Vanessa Bender, Erik Bloss, Davi Bock, Shelly Buffington, Xing Chen, Frances Cho, Gabrielle Edgerton, multiple generations of the COSMO summer school, Jason Perry, Jermyn See, Nelson Spruston, David Stern, Alice Ting, Joshua Vogelstein, Ronald Weber.