{
  "claim_scope": "stipulated equal-mean event laws; arbitrary unit-event signal, not calibrated detector",
  "formula": "8.12",
  "moments": {
    "exclusive_covariance": [
      [
        250.0,
        0.0
      ],
      [
        0.0,
        750.0
      ]
    ],
    "fractions": [
      0.25,
      0.75
    ],
    "mean": [
      250.0,
      750.0
    ],
    "shared_covariance": [
      [
        62.5,
        187.5
      ],
      [
        187.5,
        562.5
      ]
    ]
  },
  "parameters": {
    "arrival_mean": 1000.0,
    "fractions": [
      0.25,
      0.75
    ],
    "score_unit": "arbitrary unit-event signal"
  }
}