{
  "id": 9630,
  "title": "~.72 roc in train set but ~.54 in test set",
  "url": "/competitions/acquire-valued-shoppers-challenge/discussion/9630",
  "author_name": "",
  "post_date": "2014-07-01T20:56:54.137Z",
  "votes": null,
  "comment_count": 1,
  "views": 1035,
  "content": "<p>I used 25 repeated/20 folds cv and obtained ave. of .72 (roc) but my leader board score didn't improved at all. In fact, it lowered to ~.54&nbsp;</p>\n<p>does anyone knows what makes the score this much different?</p>\n<p>Any thoughts/comments will be appreciated !</p>",
  "messages": [
    {
      "id": "49926",
      "postDate": "07/01/2014 20:56:54",
      "content": "<p>I used 25 repeated/20 folds cv and obtained ave. of .72 (roc) but my leader board score didn't improved at all. In fact, it lowered to ~.54&nbsp;</p>\n<p>does anyone knows what makes the score this much different?</p>\n<p>Any thoughts/comments will be appreciated !</p>",
      "rawMarkdown": "",
      "votes": null
    },
    {
      "id": "49927",
      "postDate": "07/01/2014 21:00:43",
      "content": "<p>You should check this thread:</p>\n<p>https://www.kaggle.com/c/acquire-valued-shoppers-challenge/forums/t/7845/cross-validation-fails-to-evaluate-the-model</p>",
      "rawMarkdown": "",
      "votes": null
    }
  ],
  "comments": [
    {
      "id": 49927,
      "author_name": "alchemist",
      "author_url": "",
      "post_date": "07/01/2014 21:00:43",
      "content": "<p>You should check this thread:</p>\n<p>https://www.kaggle.com/c/acquire-valued-shoppers-challenge/forums/t/7845/cross-validation-fails-to-evaluate-the-model</p>",
      "votes": null,
      "replies": []
    }
  ],
  "raw_markdown_by_id": {
    "49926": "",
    "49927": ""
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  "source": "meta"
}