In The Place Where You Are

Riding Metro is a microcosm of our area; I was idly wondering if you could guess where any given person on the train lived based on which direction they were headed, which stop they got on/off, age, gender, race.

And then I realized there's a statistic for that -- it's called demographics. Duh.

Race	Montgomery/MD	Fairfax/VA	Wash/DC	USA
White	66.9%	71.6%	40.1%	79.8%
Black	16.9%	9.6%	54.4%	12.8%
Am.Indian	0.4%	0.4%	0.4%	1.0%
Asian	13.5%	15.9%	3.4%	4.5%
Pacific Is.	0.1%	0.1%	0.1%	0.2%
Hispanic (b)	14.8%	14.1%	8.6%	15.4%

(b) Hispanics may be of any race, so also are included in applicable race categories.
Source: http://quickfacts.census.gov/qfd/index.html (2008)