O'Hare and Narita

III. Open data exploration and data analysis
Course student learning outcome three: Students will be able to engage in data exploration and analysis using appropriate statistical techniques including numeric calculations, graphical approaches, and tests.

O'Hare Narita
O'Hare on the left, Narita on the right above.

Date	O'Hare Domestic	O'Hare International	Narita Domestic	Narita International
Jun 2013	32778	3988	4019	14358
Jul 2013	34573	4198	4183	15349
Aug 2013	34426	4215	4230	15790
Sep 2013	31793	3634	3893	15014
Oct 2013	33736	3996	3836	15148
Nov 2013	30621	3133	3627	14342
Dec 2013	29200	3245	3888	14947
Jan 2014	24854	2994	4144	15125
Feb 2014	25816	2805	3875	13598
Mar 2014	31157	3824	4701	15783
Apr 2014	31273	3479	4014	14506
May 2014	32103	3780	4094	15011

The main airport serving Chicago is O'Hare. Chicago is the headquarters of United Airlines and O'Hare serves as a central hub* for many domestic and international flights. The main airport serving Tokyo is Narita. Tokyo is the headquarters of Japan Air Lines and Narita also serves as a central hub for many domestic and international flights. The data in the tables is the number of flights per month from June 2013 to May 2014 at each airport. Both the domestic and international flights are reported. Aircraft flights include both arrivals and departures. Sources: http://www.transtats.bts.gov/Data_Elements.aspx?Data=2 and http://www.naa.jp/en/airport/traffic.html.

Provide numeric statistical support for the answers to the following questions.

Which airport, if either, is predominantly a domestic hub? Based on what statistical support?
Which airport, if either, is predominantly an international hub? Based on what statistical support?
Which airport is busier in terms of all flights? Based on what statistical support?
Are there outliers in the number of flights per month? If yes, what values are outliers? Provide statistical support.

Do not simply write down any and all statistics you have ever learned. Answer the questions and then cite the specific statistic, statistics, or charts that support that answer. When citing a statistic or statistics, include both the name of the statistic and the numeric value. If citing a chart, make a sketch of that chart to support your answer.

*"Airline hubs are airports that an airline uses as a transfer point to get passengers to their intended destination. It is part of a hub and spoke model, where travelers moving between airports not served by direct flights change planes en route to their destinations." - Wikipedia.