[
  {
    "kind": "other",
    "name": "CDC/NCHS NHANES 2011–2012 and 2013–2014 public-use DEMO, MCQ, CFQ files",
    "source": "https://wwwn.cdc.gov/nchs/nhanes/",
    "details": "Six original XPT files referenced in data/external.json by official HTTPS URL, SHA-256 and byte count. CDC/NCHS de-identified these records and released them for public use. Only aggregate results are distributed."
  },
  {
    "kind": "software",
    "name": "Python 3.12 with NumPy, pandas and SciPy",
    "details": "Pinned dependencies in env/requirements.txt; original XPT reading, SHA-256 checking, deterministic survey ratios and Taylor variance."
  },
  {
    "kind": "other",
    "name": "CDC survey design and cognitive variable documentation",
    "source": "https://wwwn.cdc.gov/nchs/nhanes/tutorials/varianceestimation.aspx",
    "details": "Also https://wwwn.cdc.gov/nchs/nhanes/tutorials/weighting.aspx and CFQ_G/CFQ_H and MCQ_G/MCQ_H codebooks beside the official data files. Pooled MEC weights divided by two; SDMVSTRA and SDMVPSU identify the public survey design."
  }
]