{
  "id": "M070",
  "type": "多选题",
  "type_code": "multiple",
  "stem": "下列说法中正确的有（）",
  "stem_text": "下列说法中正确的有（）",
  "options": [
    {
      "key": "A",
      "text": "样本均值是总体均值的无偏估计量"
    },
    {
      "key": "B",
      "text": "样本比例是总体比例的无偏估计量"
    },
    {
      "key": "C",
      "text": "样本均值是总体均值的一致估计量"
    },
    {
      "key": "D",
      "text": "样本标准差是总体标准差的无偏估计量"
    },
    {
      "key": "E",
      "text": "样本方差是总体方差的无偏估计量"
    }
  ],
  "options_text": [
    {
      "key": "A",
      "text": "样本均值是总体均值的无偏估计量"
    },
    {
      "key": "B",
      "text": "样本比例是总体比例的无偏估计量"
    },
    {
      "key": "C",
      "text": "样本均值是总体均值的一致估计量"
    },
    {
      "key": "D",
      "text": "样本标准差是总体标准差的无偏估计量"
    },
    {
      "key": "E",
      "text": "样本方差是总体方差的无偏估计量"
    }
  ],
  "answer_keys": [
    "A",
    "B",
    "C",
    "E"
  ],
  "answer_display": "ABCE",
  "answer_texts": [
    "样本均值是总体均值的无偏估计量",
    "样本比例是总体比例的无偏估计量",
    "样本均值是总体均值的一致估计量",
    "样本方差是总体方差的无偏估计量"
  ],
  "sources": [
    {
      "edition": "第16届",
      "edition_num": 16,
      "no": 70,
      "uid": "16-070",
      "file": "第16届市调大赛本科组模拟题一(1).docx"
    }
  ],
  "source_display": "第16届 第70题",
  "source_count": 1,
  "images": [],
  "warnings": [],
  "conflict": null,
  "url": "/q/M070.html"
}