Till now, the datasets were finally cleaned so that we could move to our methodology.
Methodology
First, we visualized the distribution of Citibike users' fraction of the frequency of ridings on 24 hours a day by gender in order to first have a glimpse if our hypothesis would make sense from a plot. Then we got Fig. 5 which showed us that from 5:00 to 12:00 it seemed that women tend to bike more thus our hypothesis made sense and we could do a statistical test now, which was also why I finally determined the time period of a morning between 7:00 to 12:00 as was questionned in the peer review.