{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/engineering.uncertainty.precision_mean/1.0.0/input.json",
  "title": "Uncertainty of a mean from precision — input",
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "s_r": {
      "type": "number",
      "minimum": 0,
      "description": "Repeatability standard deviation. Aliases: sr, s_repeatability, repeatability."
    },
    "s_L": {
      "type": "number",
      "minimum": 0,
      "description": "Between-laboratory standard deviation. Aliases: sL, s_lab, s_between."
    },
    "n": {
      "type": "number",
      "minimum": 2,
      "description": "Number of replicates in the mean. Aliases: n_rep, n_mean, replicates. Must be ≥ 2 so this cannot wrap s_R."
    }
  },
  "required": [
    "s_r",
    "s_L",
    "n"
  ],
  "description": "ISO 21748 u = √(s_L²+s_r²/n) of a mean of n≥2 replicates from stated precision components. Not R = 2.8·s_R, not Type A from a sample, and not U = k·u. (calculation_version 1.0.0)"
}