Conclusions -
Our data was limited to only two different months of two different years. Ultimately, we would like to retest this with a larger diversity of time to account for any unobservables. Also the 50 years of age cutoff while not necessarily arbitrary creates only a binary variable. It would be more helpful to create multiple age bins, especially seeing as how the modal years of age was around 30.
Nonetheless, since we can conclude that indeed the number of users under age 50 is statistically significantly larger than those over, we can be assured that we have found a demographic weakness in the bikeshare system: it is not attracting an entire age demographic. We hypothesis this is due to physical abilities. If that hypothesis holds true, then things like electrification with electric motors could be a way to remove this barrier and open up the system to that demographic. However, that hypothesis itself still needs to be tested. We do not fully know if it is because of physical fitness. It could be because of certain prejudices and mental heuristics held by that age demographic - e.g., cycling to them is seen as a young person thing to do or is thought to be too dangerous. This will need further investigation.