{
  "id": 10276,
  "title": "Balanced test set and bad leader board score",
  "url": "/competitions/seizure-prediction/discussion/10276",
  "author_name": "Pieter Gerrit Bosma",
  "post_date": "2014-09-09T15:34:42.417000",
  "votes": 0,
  "comment_count": 0,
  "views": 851,
  "content": "<p>I guess that the test set is not balanced, because I trained on a balanced dataset and &nbsp;my cross validation gives a much higher score ~.75 and my leader board score &lt;.5. Can someone confirm this? Will train on unbalanced dataset later. But don't have my pc with me atm.</p>",
  "messages": [
    {
      "id": 53399,
      "postDate": "2014-09-09T15:34:42.417Z",
      "content": "<p>I guess that the test set is not balanced, because I trained on a balanced dataset and &nbsp;my cross validation gives a much higher score ~.75 and my leader board score &lt;.5. Can someone confirm this? Will train on unbalanced dataset later. But don't have my pc with me atm.</p>"
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "53399": ""
  }
}