Conclusion:

The t-statistic obtained is 22.59 which is much greater than the critical value of 6.314 and the p-value obtained is extremely smaller than the alpha of 0.05 so, we can reject the null hypothesis with 95% confidence level. This means that customers do actually ride the bike for a longer time on average than subscribers. I have tried to include seasonal and temporal effects by using 2 months with different weather conditions but, might not have covered all the effects of external factors. Still, from this analysis, I can firmly state that my idea is correct.