Result
We used a one-sided z-test to test our null hypothesis in which the ratio of man above age 45 to man aged 45 or below riding a bike is the same or greater than the ratio of woman above age 45 to woman age 45 or below riding a bike. The significance level was set at 0.05. The critical value of z in this test is 1.65. Our test resulted with a z score of 18.61; therefore, we reject our null hypothesis. Our finding suggests that men above the age of 45 are less likely than woman of the same age range to use a Citi Bike. Further exploration of this analysis can help inform targeted advertising in different to further expand usage for both genders.