Figure 5.

The standardized residuals for our best fit geographic weighted regression model. The model is described by the following equation Y = 460 - 0.198 HRT DS - 1.50 UNEMPLOY - 0.000010 CROP - 33.1 RAD - 0.00834 HDD + 0.0079 SNOW - 0.117 RAIN + 0.000002 HDD² + 0.985 RAD² + 0.00000046 CROP X SNOW. There was less than 0.58% of the counties with standardized residuals greater than 3 standard deviations above (indicated dark red) or below (indicated blue) the mean for the best fit GWR model.