Zhaohong Niu (zn352)
Extracting one-month of CitiBike’s open data as a sample, I compared average trip duration in different age groups with a 5-year interval, before finalizing the age breakdown between younger and elder people. As the analysis suggested, the null hypothesis could not be rejected. The t-test result is smaller than the distribution table suggests with a df > 20, and p-value is less than alpha = 0.05. There's no significant difference between younger and elder people's trip duration of citibike usage.