GIS 4930 - Standard Residuals of Meth Lab Density Model

During the analysis phase of this module, a large number of potential explanatory variables were assessed to explain the density of meth labs found in and around the Charleston area. Most of them were gleaned from the US Census data for 2000 and 2010. The map below shows the standard deviation residuals for a linear regression model that includes variables for population density by census tract, percentage of households with a single male head of household and one or more children, and the ratio of males to females in the tract. The adjusted R-Squared value for this model is 0.572. The residuals below indicate that some tracts actual density did not match the model's predictions very well (the red ones were too high and the green, too low), but the distribution does not seem to be terribly biased, which is also confirmed by the Jarque-Bara result of 5.36.

Standard Residuals for Methamphetamine Density Model for census tracts in and around Charleston, WV