{
  "id": "S030",
  "type": "单选题",
  "type_code": "single",
  "stem": "如果将分布数列中各组变量值都减少1/2 ，各组次数增加1倍，则中位数将（ ）。",
  "stem_text": "如果将分布数列中各组变量值都减少1/2 ，各组次数增加1倍，则中位数将（ ）。",
  "options": [
    {
      "key": "A",
      "text": "不变"
    },
    {
      "key": "B",
      "text": "增加2倍"
    },
    {
      "key": "C",
      "text": "减少1/2"
    },
    {
      "key": "D",
      "text": "增加1倍"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "不变"
    },
    {
      "key": "B",
      "text": "增加2倍"
    },
    {
      "key": "C",
      "text": "减少1/2"
    },
    {
      "key": "D",
      "text": "增加1倍"
    }
  ],
  "answer_keys": [
    "C"
  ],
  "answer_display": "C",
  "answer_texts": [
    "减少1/2"
  ],
  "sources": [
    {
      "edition": "第12届",
      "edition_num": 12,
      "no": 30,
      "uid": "12-030",
      "file": "第12届本科模拟题（10.19）.xlsx"
    }
  ],
  "source_display": "第12届 第30题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/S030.html"
}