This test was done utilizing the data for only one month, a further strong evidence could be derived if the similar analysis is repeated for datasets of different months and for varying seasons. However, the key takeaway for Citi bike to gain furthermore subscribers and to expand further would be by installing stations close to corporate office buildings and Industrial Parks.
"Citibike is a Daily Commute for Subscribers and a Fancy Ride for Customers."

Bibliography

[1] K. E. Thomas, "What 22 Million Rides Tell Us About NYC Bike-Share," 28 January 2016. [Online]. Available: https://nextcity.org/daily/entry/citi-bike-new-york-city-bike-share-data.
[2]  Citibike, "Citibike Data," [Online]. Available: https://www.citibikenyc.com/system-data.