"協方差" meaning in Chinese

{
  "forms": [
    {
      "form": "协方差",
      "raw_tags": [
        "Simplified Chinese"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "noun"
      },
      "expansion": "協方差",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Chinese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "zh",
          "name": "Statistics",
          "orig": "zh:Statistics",
          "parents": [
            "Formal sciences",
            "Mathematics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "covariance"
      ],
      "id": "en-協方差-zh-noun-KFrgBDkl",
      "links": [
        [
          "statistics",
          "statistics"
        ],
        [
          "covariance",
          "covariance"
        ]
      ],
      "raw_glosses": [
        "(statistics) covariance"
      ],
      "topics": [
        "mathematics",
        "sciences",
        "statistics"
      ]
    }
  ],
  "sounds": [
    {
      "tags": [
        "Mandarin",
        "Pinyin"
      ],
      "zh-pron": "xiéfāngchā"
    },
    {
      "tags": [
        "Mandarin",
        "bopomofo"
      ],
      "zh-pron": "ㄒㄧㄝˊ ㄈㄤ ㄔㄚ"
    },
    {
      "tags": [
        "Hanyu-Pinyin",
        "Mandarin"
      ],
      "zh-pron": "xiéfāngchā"
    },
    {
      "tags": [
        "Mandarin",
        "Tongyong-Pinyin"
      ],
      "zh-pron": "siéfangcha"
    },
    {
      "tags": [
        "Mandarin",
        "Wade-Giles"
      ],
      "zh-pron": "hsieh²-fang¹-chʻa¹"
    },
    {
      "tags": [
        "Mandarin",
        "Yale"
      ],
      "zh-pron": "syé-fāng-chā"
    },
    {
      "tags": [
        "Gwoyeu-Romatsyh",
        "Mandarin"
      ],
      "zh-pron": "shyefangcha"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "сефанча"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "sefanča"
    },
    {
      "ipa": "/ɕi̯ɛ³⁵ fɑŋ⁵⁵ ʈ͡ʂʰä⁵⁵/",
      "tags": [
        "Mandarin",
        "Sinological-IPA"
      ]
    },
    {
      "ipa": "/ɕi̯ɛ³⁵ fɑŋ⁵⁵ ʈ͡ʂʰä⁵⁵/"
    }
  ],
  "word": "協方差"
}

{
  "forms": [
    {
      "form": "协方差",
      "raw_tags": [
        "Simplified Chinese"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "zh",
        "2": "noun"
      },
      "expansion": "協方差",
      "name": "head"
    }
  ],
  "lang": "Chinese",
  "lang_code": "zh",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Chinese entries with incorrect language header",
        "Chinese lemmas",
        "Chinese nouns",
        "Chinese terms with IPA pronunciation",
        "Mandarin lemmas",
        "Mandarin nouns",
        "zh:Statistics"
      ],
      "glosses": [
        "covariance"
      ],
      "links": [
        [
          "statistics",
          "statistics"
        ],
        [
          "covariance",
          "covariance"
        ]
      ],
      "raw_glosses": [
        "(statistics) covariance"
      ],
      "topics": [
        "mathematics",
        "sciences",
        "statistics"
      ]
    }
  ],
  "sounds": [
    {
      "tags": [
        "Mandarin",
        "Pinyin"
      ],
      "zh-pron": "xiéfāngchā"
    },
    {
      "tags": [
        "Mandarin",
        "bopomofo"
      ],
      "zh-pron": "ㄒㄧㄝˊ ㄈㄤ ㄔㄚ"
    },
    {
      "tags": [
        "Hanyu-Pinyin",
        "Mandarin"
      ],
      "zh-pron": "xiéfāngchā"
    },
    {
      "tags": [
        "Mandarin",
        "Tongyong-Pinyin"
      ],
      "zh-pron": "siéfangcha"
    },
    {
      "tags": [
        "Mandarin",
        "Wade-Giles"
      ],
      "zh-pron": "hsieh²-fang¹-chʻa¹"
    },
    {
      "tags": [
        "Mandarin",
        "Yale"
      ],
      "zh-pron": "syé-fāng-chā"
    },
    {
      "tags": [
        "Gwoyeu-Romatsyh",
        "Mandarin"
      ],
      "zh-pron": "shyefangcha"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "сефанча"
    },
    {
      "tags": [
        "Mandarin",
        "Palladius"
      ],
      "zh-pron": "sefanča"
    },
    {
      "ipa": "/ɕi̯ɛ³⁵ fɑŋ⁵⁵ ʈ͡ʂʰä⁵⁵/",
      "tags": [
        "Mandarin",
        "Sinological-IPA"
      ]
    },
    {
      "ipa": "/ɕi̯ɛ³⁵ fɑŋ⁵⁵ ʈ͡ʂʰä⁵⁵/"
    }
  ],
  "word": "協方差"
}

{
  "called_from": "pronunciations/296/20230324",
  "msg": "Zh-pron header not found in zh_pron_tags or tags: '(Standard Chinese)⁺'",
  "path": [
    "協方差"
  ],
  "section": "Chinese",
  "subsection": "",
  "title": "協方差",
  "trace": ""
}