Chronic absenteeism vs average daily attendance
How the two measures move together, and by how much more the threshold measure changes.
Shown in the working analysis, Figure 4
- 1How it was computedweighted means of both; Pearson and Spearman correlations across schools per year
- universe
- Schools with both measures in a year (served database)
- packet block
- ca_vs_ada
Uses: Chronic absenteeism as 100 minus the 90%-attendance share
- 2What went inInputs
- attendance_rate_above_90 — served metric; its own tree covers file, load, and checks.
- average_daily_attendance — served metric; its own tree covers file, load, and checks.
- 3The generated fileThe committed data file
Generated 2026-09-08 by one script from the inputs above; the page renders only from this file.
This block’s raw values (JSON)
{ "2020-21": { "weighted_ca": 29.3657, "weighted_ada": 89.6617, "school_level_r": -0.9809, "spearman_r": -0.9867, "r_squared": 0.9622, "n_schools": 212 }, "2021-22": { "weighted_ca": 42.0446, "weighted_ada": 87.6804, "school_level_r": -0.9502, "spearman_r": -0.9845, "r_squared": 0.9029, "n_schools": 213 }, "2022-23": { "weighted_ca": 39.0188, "weighted_ada": 88.6571, "school_level_r": -0.9527, "spearman_r": -0.9847, "r_squared": 0.9076, "n_schools": 215 }, "2023-24": { "weighted_ca": 38.1259, "weighted_ada": 88.8398, "school_level_r": -0.953, "spearman_r": -0.9854, "r_squared": 0.9081, "n_schools": 216 }, "2024-25": { "weighted_ca": 37.7354, "weighted_ada": 89.1626, "school_level_r": -0.9441, "spearman_r": -0.9825, "r_squared": 0.8913, "n_schools": 216 } }Evidence: packet JSON · generator script
- 4How it was checkedChecked: passed
- ✓ passedBoth weighted means, both correlations, and the school count recomputed independently for every year and matched (full QA §D); both inputs also pass their base case against the district's files (full QA §A).
The QA report behind this status · the report also lists what it does not check.
Each input metric’s own checks are on its metric tree (links above). Only the district-wide all-students series is covered by the packet’s 15 source-vs-database checks; that coverage is not claimed for any other block.
- 5Assumptions & caveatsAssumptions and caveats
None beyond the input metrics’ own assumptions.
The numbers in this block
| Year | Chronic absenteeism (below-90 share) | Average daily attendance | Correlation across schools (Pearson) | Rank correlation (Spearman) | Schools |
|---|---|---|---|---|---|
| 2020-21 † | 29.4% | 89.7% | −0.981 | −0.987 | 212 |
| 2021-22 | 42.0% | 87.7% | −0.950 | −0.985 | 213 |
| 2022-23 | 39.0% | 88.7% | −0.953 | −0.985 | 215 |
| 2023-24 | 38.1% | 88.8% | −0.953 | −0.985 | 216 |
| 2024-25 | 37.7% | 89.2% | −0.944 | −0.983 | 216 |
Both measures student-weighted over schools with both values. The correlations are negative because a higher below-90 share goes with lower average daily attendance.
Every school behind this figure
The district's measure: share of each school's students attending less than 90% of days (100 minus the district's 90%+ figure). 2020-21 † was mostly virtual. Click any value for its full trace. 216 schools.