Independent practice · Evidence review

Build a results JSON object

Your task

Return tickets, median_minutes (numbers), satisfaction_percent (null), source_ids (array).
Use the fixed source IDs. Array order follows the contract.
Do not invent unsupported values. Missing evidence must remain unknown.

Target: 70/100. Suggested active time: 10 minutes. You can keep working after that.

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JSON null has no quotation marks.

View the scoring standard

Accuracy checks the values. Coverage checks the requested output. Time is recorded separately and never changes your score.

tickets: 25 points

median_minutes: 25 points

satisfaction_percent: 25 points

source_ids: 25 points

This score checks fixed evidence fields and exact types. It does not assess the quality of arbitrary writing.

Input materials

{
  "sources": [
    {
      "id": "S1",
      "title": "Pilot brief",
      "text": "The fictional Northstar pilot starts 2026-11-02. It covers 12 support agents. The pilot lasts 14 calendar days. Budget is 2400 USD."
    },
    {
      "id": "S2",
      "title": "Review policy",
      "text": "Morgan owns the review. No customer personal data may enter the pilot. No automation may send customer replies without human approval."
    },
    {
      "id": "S3",
      "title": "Results memo",
      "text": "The test processed 80 synthetic tickets. 72 had the correct category. Median handling time was 6 minutes. Customer satisfaction was not measured."
    }
  ],
  "brief": "Return tickets, median_minutes (numbers), satisfaction_percent (null), source_ids (array).",
  "flawed_output": "{\"tickets\":\"80 tickets\",\"median_minutes\":\"6m\",\"satisfaction_percent\":0}"
}

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JSON answer

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{
  "tickets": 80,
  "median_minutes": 6,
  "satisfaction_percent": null,
  "source_ids": [
    "S3"
  ]
}

Zero would assert a measured value. Use null for missing satisfaction data.