"mean error" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "兩岸化學名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "通訊專有名詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "通訊工程專有名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "中文",
  "lang_code": "zh",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "* [S:化学]平均误差\n'\n* [T:化學]平均誤差\n* [简体]:平均误差[通信]\n* [正體]:平均誤差[通訊]\n* 正體: 平均誤差[通訊工程]"
      ],
      "id": "zh-mean_error-zh-unknown-vhwMbpQD"
    }
  ],
  "word": "mean error"
}

{
  "categories": [
    "兩岸化學名詞",
    "通訊專有名詞",
    "通訊工程專有名詞"
  ],
  "lang": "中文",
  "lang_code": "zh",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "* [S:化学]平均误差\n'\n* [T:化學]平均誤差\n* [简体]:平均误差[通信]\n* [正體]:平均誤差[通訊]\n* 正體: 平均誤差[通訊工程]"
      ]
    }
  ],
  "word": "mean error"
}