PhiladelphiaAlgorithm
Weighting the state's attendance measure by enrollment
The state publishes no student counts for its attendance measure, and enrollment is loaded for every sector only for 2024-25. Sector averages therefore weight each school by its 2024-25 enrollment in every year, with the unweighted school mean and median shown alongside.
- 1How it was computedSteps
- weighted = Σ(value × enrollment₂₀₂₄₋₂₅) / Σ enrollment₂₀₂₄₋₂₅ over schools with both.
Inputs: attendance_persistence_rate; enrollment (2024-25)
Evidence: philly-absenteeism-descriptives.ts — search "function sectorStats"
- 2Assumptions & caveatsAssumptions
- Relative school sizes in earlier years are approximated by 2024-25 enrollment.
- 3How it was checkedHow it was checked
Recomputed independently in Python for every sector, year, and school type (full QA §D). Note the limitation: fixed weights make this an average of school rates, not the share of the sector's students.