{
  "task_id": "F1-conf-04",
  "n_records_control": 1200,
  "n_valid_records": 1164,
  "n_unreadable_records": 36,
  "n_analysed": 1164,
  "sum_price_control": 471287000,
  "sum_price_valid": 456370000,
  "sum_price_unreadable_implied": 14917000,
  "mean_price_valid": 392070.45,
  "median_price_per_m2_valid": 2984.937,
  "feasibility": "partial",
  "feasibility_reason": "36 of the 1200 records in the provider's control count could not be analysed: their lines in sales.csv are garbled (corrupted characters / wrong field count / malformed sale_id) and cannot be read unambiguously; they were not reconstructed. Their implied price sum is 14917000 CAD.",
  "data_issues": [
    {
      "issue": "36 data lines in sales.csv are garbled (random characters, wrong field count, malformed sale_id); unreadable records per municipality implied by control totals: {'Gatineau': 11, 'Laval': 8, 'Sherbrooke': 7, 'Levis': 3, 'Longueuil': 7}",
      "handling": "excluded; not reconstructed or imputed; their implied price sum reported as sum_price_unreadable_implied"
    },
    {
      "issue": "25 readable records have price_cad written as a quoted string with comma thousands separators (e.g. \"280,000\")",
      "handling": "parsed unambiguously by removing the thousands separator (CSV quoting makes the field boundary unambiguous); retained"
    }
  ],
  "n_input_rows": {
    "sales.csv": 1200
  },
  "random_seed": null,
  "n_by_municipality_valid": {
    "Gatineau": 335,
    "Laval": 274,
    "Levis": 159,
    "Longueuil": 187,
    "Sherbrooke": 209
  },
  "n_by_municipality_unreadable_implied": {
    "Gatineau": 11,
    "Laval": 8,
    "Sherbrooke": 7,
    "Levis": 3,
    "Longueuil": 7
  },
  "missing_sale_ids_range": [
    "S00700",
    "S00735"
  ],
  "n_missing_sale_ids": 36,
  "mean_price_unreadable_implied": 414361.11,
  "mean_price_control_implied": 392739.17
}