Chapter 5: Early Positivism
Robbery by State, Types of Weapons, 2015
https://ucr.fbi.gov/crime-in-the-u.s/2015/crime-in-the-u.s.-2015/tables/table-21
Median Household Income, 2014
http://www.census.gov/did/www/saipe/data/interactive/saipe.html?s_appName=saipe&map_yearSelector=2014&map_geoSelector=mhi_c&s_measures=mhi_snc&menu=grid_proxy&s_inclStTot=y&s_USStOnly=y