{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/engineering.uncertainty.welch_satterthwaite/1.0.0/input.json",
  "title": "Welch–Satterthwaite ν_eff — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "u": {
      "type": "array",
      "items": {
        "type": "number",
        "minimum": 0
      },
      "minItems": 1,
      "description": "Standard uncertainty components u_i. Share-URL: comma-separated."
    },
    "nu": {
      "type": "array",
      "description": "Degrees of freedom ν_i, same length as u. Use inf (JSON null) for Type B with infinite dof."
    },
    "uc": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Optional combined standard uncertainty. Default hypot(u)."
    }
  },
  "required": [
    "u",
    "nu"
  ],
  "description": "Effective degrees of freedom ν_eff = u_c⁴ / Σ (u_i⁴ / ν_i) (GUM G.4). If uc is omitted, u_c is the uncorrelated RSS of u_i. Not combined RSS as a product page and not expanded U = k·u_c. (calculation_version 1.0.0)"
}