{
  "id": "M040",
  "type": "多选题",
  "type_code": "multiple",
  "stem": "下列关于几种概率抽样方法设计效应deff的说法中，通常情况下正确的有（）。",
  "stem_text": "下列关于几种概率抽样方法设计效应deff的说法中，通常情况下正确的有（）。",
  "options": [
    {
      "key": "A",
      "text": "简单随机抽样的deff=1"
    },
    {
      "key": "B",
      "text": "分层随机抽样的deff<1"
    },
    {
      "key": "C",
      "text": "整群随机抽样的deff<1"
    },
    {
      "key": "D",
      "text": "系统随机抽样的deff>1"
    },
    {
      "key": "E",
      "text": "多阶段随机抽样的deff>1"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "简单随机抽样的deff=1"
    },
    {
      "key": "B",
      "text": "分层随机抽样的deff<1"
    },
    {
      "key": "C",
      "text": "整群随机抽样的deff<1"
    },
    {
      "key": "D",
      "text": "系统随机抽样的deff>1"
    },
    {
      "key": "E",
      "text": "多阶段随机抽样的deff>1"
    }
  ],
  "answer_keys": [
    "A",
    "B",
    "E"
  ],
  "answer_display": "ABE",
  "answer_texts": [
    "简单随机抽样的deff=1",
    "分层随机抽样的deff<1",
    "多阶段随机抽样的deff>1"
  ],
  "sources": [
    {
      "edition": "第14届",
      "edition_num": 14,
      "no": 69,
      "uid": "14-069",
      "file": "第14届市调大赛本科组模拟题(9).docx"
    }
  ],
  "source_display": "第14届 第69题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/M040.html"
}