{
  "id": 344470,
  "title": "My lb score is lower than cv score?Can anyone explain?",
  "url": "/competitions/amex-default-prediction/discussion/344470",
  "author_name": "",
  "post_date": "2022-08-15T10:58:24.420808800Z",
  "votes": null,
  "comment_count": 4,
  "views": 0,
  "content": "<p>My xgb cv score is 0.7982 but lb is 0.797,is it normal?</p>",
  "messages": [
    {
      "id": "1899558",
      "postDate": "08/15/2022 10:58:24",
      "content": "<p>My xgb cv score is 0.7982 but lb is 0.797,is it normal?</p>",
      "rawMarkdown": "My xgb cv score is 0.7982 but lb is 0.797,is it normal?",
      "votes": null
    },
    {
      "id": "1899580",
      "postDate": "08/15/2022 11:17:37",
      "content": "<p>I would say that this deviation is within the expected margin. It is probably caused by the difference between the train and test data distribution.</p>",
      "rawMarkdown": "I would say that this deviation is within the expected margin. It is probably caused by the difference between the train and test data distribution.",
      "votes": null
    },
    {
      "id": "1899658",
      "postDate": "08/15/2022 12:31:46",
      "content": "<p>I  am also facing the same issue my cv score is .7968  and on lb, I am getting .795. I also encountered a gap while training NN my cv for them was .793 but lb was .782. </p>",
      "rawMarkdown": "I  am also facing the same issue my cv score is .7968  and on lb, I am getting .795. I also encountered a gap while training NN my cv for them was .793 but lb was .782.",
      "votes": null
    },
    {
      "id": "1901013",
      "postDate": "08/16/2022 12:14:53",
      "content": "<p>What CV strategy are you using?</p>\n<p>The Devastator.</p>",
      "rawMarkdown": "What CV strategy are you using?\n\nThe Devastator.",
      "votes": null
    },
    {
      "id": "1901023",
      "postDate": "08/16/2022 12:27:39",
      "content": "<p>StratifiedKFold.My CV stategy is same as this notebook:AMEX: Bruteforce Feature Engineering</p>",
      "rawMarkdown": "StratifiedKFold.My CV stategy is same as this notebook:AMEX: Bruteforce Feature Engineering",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 1899580,
      "author_name": "fritzcremer",
      "author_url": "",
      "post_date": "08/15/2022 11:17:37",
      "content": "<p>I would say that this deviation is within the expected margin. It is probably caused by the difference between the train and test data distribution.</p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 1899658,
      "author_name": "chaudharypriyanshu",
      "author_url": "",
      "post_date": "08/15/2022 12:31:46",
      "content": "<p>I  am also facing the same issue my cv score is .7968  and on lb, I am getting .795. I also encountered a gap while training NN my cv for them was .793 but lb was .782. </p>",
      "votes": null,
      "replies": []
    },
    {
      "id": 1901013,
      "author_name": "thedevastator",
      "author_url": "",
      "post_date": "08/16/2022 12:14:53",
      "content": "<p>What CV strategy are you using?</p>\n<p>The Devastator.</p>",
      "votes": null,
      "replies": [
        {
          "id": 1901023,
          "author_name": "cjzccc",
          "author_url": "",
          "post_date": "08/16/2022 12:27:39",
          "content": "<p>StratifiedKFold.My CV stategy is same as this notebook:AMEX: Bruteforce Feature Engineering</p>",
          "votes": null,
          "replies": []
        }
      ]
    }
  ],
  "raw_markdown_by_id": {
    "1899558": "My xgb cv score is 0.7982 but lb is 0.797,is it normal?",
    "1899580": "I would say that this deviation is within the expected margin. It is probably caused by the difference between the train and test data distribution.",
    "1899658": "I  am also facing the same issue my cv score is .7968  and on lb, I am getting .795. I also encountered a gap while training NN my cv for them was .793 but lb was .782.",
    "1901013": "What CV strategy are you using?\n\nThe Devastator.",
    "1901023": "StratifiedKFold.My CV stategy is same as this notebook:AMEX: Bruteforce Feature Engineering"
  },
  "source": "meta"
}