Appendix B: Selected Regression Models 1. Taxonomy of selected fitted school-level Ordinary Least Squares regression models predicting district identification rates of students with Incidence’ disabilities in Massachusetts ‘High public school districts, n=298 traditional school districts (model excludes charter schools, vocational/tech schools, or schools serving special education students exclusively). Model 1.1 Model 1.2 Model 1.3 Model 1.4 1.5 11.194** 8.456** 7.309** 8.554** 9.275** Intercept (0.156) (1.234) (1.948) (2.924) (0.454) District Percent White 0.010 0.022 0.021 Students (0.011) (0.018) (0.019) District Percent Students 1.155** 1.123** 1.096** 1.095** eligible for Free/Reduced (0.297) (0.282) (0.292) (0.261) Price Lunch (log2) District Participates in 0.055 METCO Program (0.542) District Percent Students 0.210 0.384 with Limited English (0.275) (0.301) Proficiency (square root) -0.255 District Enrollment (log2) (0.372) 0.570 0.609 District is ‘Rural’ (0.424) (0.355) -0.311 -0.139 District is ‘Town’ (0.661) (0.600) -0.075 -0.232 District is ‘City’ (0.837) (0.777) District Percent Elementary -0.005 (0.008) Schools R2 0.000 0.057 0.059 0.072 0.065 N 298 298 298 298 298 dfERROR 297 294 294 289 293 * p<0.05; ** p<0.01 Table 2. Taxonomy of selected fitted school-level Ordinary Least Squares regression models
Appendix B: Selected Regression Models 1. Taxonomy of selected fitted school-level Ordinary Least Squares regression models predicting district identification rates of students with ‘High Incidence’ disabilities in Massachusetts public school districts, n=298 traditional school districts (model excludes charter schools, vocational/tech schools, or schools serving special education students exclusively). Model 1.1 Model 1.2 Model 1.3 Model 1.4 1.5 Intercept 11.194** (0.156) 8.456** (1.234) 7.309** (1.948) 8.554** (2.924) 9.275** (0.454) District Percent White Students 0.010 (0.011) 0.022 (0.018) 0.021 (0.019) District Percent Students eligible for Free/Reduced Price Lunch (log2) 1.155** (0.297) 1.123** (0.282) 1.096** (0.292) 1.095** (0.261) District Participates in METCO Program 0.055 (0.542) District Percent Students with Limited English Proficiency (square root) 0.210 (0.275) 0.384 (0.301) District Enrollment (log2) -0.255 (0.372) District is ‘Rural’ 0.570 (0.424) 0.609 (0.355) District is ‘Town’ -0.311 (0.661) -0.139 (0.600) District is ‘City’ -0.075 (0.837) -0.232 (0.777) District Percent Elementary Schools -0.005 (0.008) R2 0.000 0.057 0.059 0.072 0.065 N 298 298 298 298 298 dfERROR 297 294 294 289 293 * p<0.05; ** p<0.01 Table 2. Taxonomy of selected fitted school-level Ordinary Least Squares regression models
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