> There are actually 2 cities. I think your comment can teach an important lesson in statistics. Without proper segmentation, totals and averages and medians c

> There are actually 2 cities. I think your comment can teach an important lesson in statistics. Without proper segmentation, totals and averages and medians can obscure real and important results. (This is only one part of the general "garbage in garbage out" data-quality problem BTW.) If the arbitrary political boundary that defines "San Francisco" were changed so that it actually became two cities, it would be abundantly clear that one of them has severe problems and it would probably qualify for all sorts of state/federal assistance that the current aggregate does not.