{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/engineering.conformity.zeta_score.input.json",
  "title": "Zeta-score — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "ylab": {
      "type": "number",
      "description": "Laboratory / participant result. Aliases: y, x."
    },
    "xref": {
      "type": "number",
      "description": "Assigned or reference value. Aliases: X, ref."
    },
    "ulab": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Standard uncertainty of ylab. Aliases: u_lab, u_x. Not expanded U."
    },
    "uref": {
      "type": "number",
      "exclusiveMinimum": 0,
      "description": "Standard uncertainty of xref. Aliases: u_ref, u_X. Not expanded U."
    }
  },
  "required": [
    "ylab",
    "xref",
    "ulab",
    "uref"
  ],
  "description": "Proficiency-testing zeta-score ζ = (ylab−xref)/√(ulab²+uref²). ulab and uref are standard uncertainties (ISO 13528). |ζ| ≤ 2 pass, 2 < |ζ| < 3 warning, |ζ| ≥ 3 fail. Not En, not TUR, and not an ILAC G8 spec decision. (calculation_version 1.0.0)"
}