{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/engineering.measurement.duplicate_sd/1.0.0/input.json",
  "title": "Repeatability from duplicates — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "d": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "minItems": 2,
      "description": "Duplicate differences d_i = y1−y2. Aliases: diffs, differences, delta. Share-URL: comma-separated."
    },
    "y1": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "First of each pair. Used with y2 when d is omitted."
    },
    "y2": {
      "type": "array",
      "items": {
        "type": "number"
      },
      "description": "Second of each pair, same length as y1."
    }
  },
  "required": [
    "d"
  ],
  "description": "ISO 5725 repeatability s_r = √(Σ d_i² / (2m)) from m≥2 duplicate differences. Not Type A from a sample of observations, not r = 2.8·s, and not AIAG GRR EV = R̄/d2. (calculation_version 1.0.0)"
}