{
  "citation": "NIST/ITL StRD, Univariate Summary Statistics: PiDigits (PiDigits.dat), certified values",
  "deviation_evidence": null,
  "doi": null,
  "excerpt": "Sample Standard Deviation (denom. = n-1) s: 2.86733906028871",
  "independent": null,
  "item_set": null,
  "kind": "certified",
  "known_deviation": null,
  "licence": "Public domain: a work of the US Government (NIST/ITL Statistical Reference Datasets)",
  "locator": "Certified Values block (lines 41-43), row 'Sample Standard Deviation (denom. = n-1) s'",
  "metric": null,
  "n_items": null,
  "page": null,
  "read_copy_sha256": "e9421a2f4c0a31c505099332b4d22e507e808953c3c57bddae9226f25587d7d2",
  "retrieved_at": "2026-10-15",
  "se": null,
  "se_as_published": null,
  "source_id": "nist_univariate.pidigits.sd",
  "tolerance_reason": null,
  "units": null,
  "url": "https://www.itl.nist.gov/div898/strd/univ/data/PiDigits.dat",
  "value": 2.86733906028871,
  "value_as_published": "2.86733906028871",
  "verified_by": "primary_source",
  "verified_note": "Parsed from the certified block of the file as itl.nist.gov served it (CRLF); the pinned mirror the suite fetches has the same bytes exactly. Re-derived from the data with exact rational arithmetic in tests/test_suite_nist_extra.py."
}