3 ms·
Data that reports per-person activity needs to control for population density in each section, otherwise it just becomes a population map. http://xkcd.com/1138
by brown9-2 13y ago
Data that reports per-person activity needs to control for population density in each section, otherwise it just becomes a population map.
http://xkcd.com/1138/ http://xkcd.com/1138/