{
  "schemaVersion": 1,
  "source": "https://www.loc.gov/preservation/resources/rt/NIST_LC_OpticalDiscLongevity.pdf",
  "locator": "Appendix I, steps 6-7, printed pages 30-31",
  "accessed": "2026-10-15",
  "kind": "arithmetic-check-of-rounded-published-summary",
  "logHoursMean": 12.28,
  "logHoursStdDev": 0.45,
  "sampleSize": 90,
  "normalLowerFivePercent": -1.6448536269514722,
  "confidenceMultiplier": 1.96,
  "hoursPerYear": 8760,
  "limitations": "Not a refit, raw-data replication, modern-media forecast or independent validation of the report's confidence procedure. Does not propagate uncertainty in the Eyring fit or estimated dispersion."
}