curl --request POST \
  --url https://api.example.com/v1/tests \
  --header 'Content-Type: application/json' \
  --data '
{
  "population_id": "<string>",
  "tests": {
    "question": "<string>",
    "question_options": {
      "question_type": "single-choice",
      "limit": 123
    },
    "ground_answer_counts": {},
    "ground_answer_sample_size": 123,
    "answer_options": [
      "<string>"
    ]
  },
  "batch": {
    "name": "Q4 user trends questions",
    "description": "A copy testing benchmarking batch",
    "effective_date": "2024-01-09"
  }
}
'

{
  "data": [
    {
      "id": "b8b3e8cb-4c67-40d7-8350-3eac3c2b127d",
      "created_at": "2025-06-23T15:40:52Z",
      "population": "af8917b4-a09c-41f9-9c9f-c4c40c1f7415",
      "status": "Predicted",
      "population_name": "Developers",
      "question": "Tech debt or unclear error messages, what's worse?",
      "accuracy": 0.8528,
      "squared_error": 0.1607,
      "root_mean_squared_error": 0.1607,
      "simulated_answer_percentages": {
        "Tech debt": 0.5488,
        "Unclear error messages": 0.4512
      },
      "predicted_answer_percentages": {
        "Tech debt": 0.5488,
        "Unclear error messages": 0.4512
      },
      "information_loss": 0.0043,
      "normalised_information_loss": 0.051,
      "batch": "1e6bfe22-40d9-46c4-b241-9e1d7d5c5560",
      "test_started_at": "2025-06-23T15:44:10Z",
      "test_finished_at": "2025-06-23T15:45:30Z",
      "ground_answer_counts": {
        "Tech debt": 58,
        "Unclear error messages": 42
      },
      "ground_answer_percentages": {
        "Tech debt": 0.58,
        "Unclear error messages": 0.42
      },
      "simulation_engine": "answers-1",
      "public": false,
      "answer_options": [
        "Tech debt",
        "Unclear error messages"
      ],
      "question_options": {
        "question_type": "single-choice"
      }
    }
  ],
  "errors": [
    {
      "code": "<string>",
      "message": "<string>"
    }
  ]
}