Distribution of forward sortation area (FSA)-level Anscombe residuals from the multivariable negative binomial regression model
a) Positive values signify under-prediction whereas negative values signify over-prediction. Dependent variable: Number of Salmonella Enteritidis infections aggregated to the Forward Sortation Area (FSA)-level. Offset: natural log-transformed FSA-based expected number of cases. Independent categorical variables: FSA-level average median family income and visible minority population proportion. Independent continuous variable: FSA-level average number of children at home per census family linear and quadratic terms.