"marginal distribution" meaning in English

{
  "forms": [
    {
      "form": "marginal distributions",
      "tags": [
        "plural"
      ]
    }
  ],
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      "args": {},
      "expansion": "marginal distribution (plural marginal distributions)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Probability theory",
          "orig": "en:Probability theory",
          "parents": [
            "Mathematical analysis",
            "Mathematics",
            "Formal sciences",
            "Sciences",
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      ],
      "glosses": [
        "The projection of a joint probability distribution onto one of its component random variables."
      ],
      "id": "en-marginal_distribution-en-noun-B6grAJA2",
      "links": [
        [
          "projection",
          "projection"
        ],
        [
          "joint probability",
          "joint probability"
        ],
        [
          "distribution",
          "distribution"
        ],
        [
          "random variable",
          "random variable"
        ]
      ],
      "wikipedia": [
        "marginal distribution"
      ]
    }
  ],
  "word": "marginal distribution"
}

{
  "forms": [
    {
      "form": "marginal distributions",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "marginal distribution (plural marginal distributions)",
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  "lang_code": "en",
  "pos": "noun",
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        "en:Probability theory"
      ],
      "glosses": [
        "The projection of a joint probability distribution onto one of its component random variables."
      ],
      "links": [
        [
          "projection",
          "projection"
        ],
        [
          "joint probability",
          "joint probability"
        ],
        [
          "distribution",
          "distribution"
        ],
        [
          "random variable",
          "random variable"
        ]
      ],
      "wikipedia": [
        "marginal distribution"
      ]
    }
  ],
  "word": "marginal distribution"
}