models/sim_calib.json

{
  "a": 3.8806,
  "b": 5.448,
  "fit": "linear",
  "loo_mae": 3.22,
  "n": 12,
  "uncalibrated_mae": 6.6,
  "note": "verbatim_index -> Turnitin overall%, LOO-validated"
}