{
  "id": "S097",
  "type": "单选题",
  "type_code": "single",
  "stem": "如果总体目标参数是总体比例，且对于总体比例的大小一无所知，此时为确保达到调查要求的精度，在计算样本量时，可将总体比例的取值设定为（）。",
  "stem_text": "如果总体目标参数是总体比例，且对于总体比例的大小一无所知，此时为确保达到调查要求的精度，在计算样本量时，可将总体比例的取值设定为（）。",
  "options": [
    {
      "key": "A",
      "text": "0"
    },
    {
      "key": "B",
      "text": "0.5"
    },
    {
      "key": "C",
      "text": "0.25"
    },
    {
      "key": "D",
      "text": "1"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "0"
    },
    {
      "key": "B",
      "text": "0.5"
    },
    {
      "key": "C",
      "text": "0.25"
    },
    {
      "key": "D",
      "text": "1"
    }
  ],
  "answer_keys": [
    "B"
  ],
  "answer_display": "B",
  "answer_texts": [
    "0.5"
  ],
  "sources": [
    {
      "edition": "第13届",
      "edition_num": 13,
      "no": 50,
      "uid": "13-050",
      "file": "第13届市调大赛本科组模拟题.docx"
    },
    {
      "edition": "第17届",
      "edition_num": 17,
      "no": 37,
      "uid": "17-037",
      "file": "17届市调大赛本科组模拟题.docx"
    }
  ],
  "source_display": "第13届 第50题、第17届 第37题",
  "source_count": 2,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/S097.html"
}