{
  "version": "1.0.0",
  "auditType": "Original arithmetic reproducibility audit of published NCHS summary values; not new population research.",
  "inputs": "16 sex-by-age rows x 11 statistics from tables 7 and 8; exclude 2 unavailable matched 95th-percentile values = 174 paired statistics.",
  "conversion": "One international inch is exactly 2.54 centimetres. Convert the already rounded table 8 values, not raw observations.",
  "residual": "delta = published_cm - published_in * 2.54. Values at three decimal places expose arithmetic residuals, not measurement precision.",
  "conditionalBound": "If both versions are rounded independently to nearest 0.1 unit from one underlying statistic, abs(delta) <= 0.05 cm + 0.05 in * 2.54 cm/in = 0.177 cm. This consistency test does not establish which rounding rule NCHS used.",
  "implementation": "Node reproducibility script uses integer thousandths of a cm; private independent verification uses Python Decimal.",
  "interpretation": "Passing the bound is consistent with separate rounding, not proof of the original rounding algorithm, dataset accuracy, or greater measurement precision. The native unit table remains the source of each displayed value.",
  "summary": {
    "pairedStatistics": 174,
    "missingPairs": 2,
    "withinRoundingBound": 174,
    "boundCm": "0.177",
    "maxAbsoluteResidualCm": "0.166",
    "byStatistic": {
      "mean": 16,
      "se": 16,
      "p05": 16,
      "p10": 16,
      "p15": 16,
      "p25": 16,
      "p50": 16,
      "p75": 16,
      "p85": 16,
      "p90": 16,
      "p95": 14
    }
  },
  "sources": [
    "https://www.cdc.gov/nchs/data/series/sr_03/sr03-050.pdf",
    "https://www.nist.gov/pml/owm/si-units-length",
    "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors"
  ],
  "updatePolicy": "Versioned v1 artifacts are immutable; source corrections or changed calculations get a new version path and dated change note. Recheck when a newer comparable NCHS report is released."
}