"null hypothesis" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "兩岸化學名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "大氣科學專有名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英语名词",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "電子電機工程專有名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "中文",
  "lang_code": "zh",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "* [S:化学]零假设\n'\n* [T:化學]零假設\n* [简体]:零假设[电子电机工程]\n* [正體]:零假設[電子電機工程]\n* 简体: 解消假设[大气]\n* 正體: 虛無假設[氣象]"
      ],
      "id": "zh-null_hypothesis-zh-unknown-82lHfqnN"
    }
  ],
  "word": "null hypothesis"
}

{
  "categories": [
    "兩岸化學名詞",
    "大氣科學專有名詞",
    "英语名词",
    "電子電機工程專有名詞"
  ],
  "lang": "中文",
  "lang_code": "zh",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "* [S:化学]零假设\n'\n* [T:化學]零假設\n* [简体]:零假设[电子电机工程]\n* [正體]:零假設[電子電機工程]\n* 简体: 解消假设[大气]\n* 正體: 虛無假設[氣象]"
      ]
    }
  ],
  "word": "null hypothesis"
}