{
  "id": 10145,
  "title": "An error in evaluation?",
  "url": "/competitions/MerckActivity/discussion/10145",
  "author_name": "Anton",
  "post_date": "2014-08-29T07:26:53.690000",
  "votes": 0,
  "comment_count": 0,
  "views": 2096,
  "content": "<p>The evaluation page&nbsp;<a href=\"http://www.kaggle.com/c/MerckActivity/details/evaluation\">states</a>&nbsp;that a correlation coefficient is used. But which one? I believe the formula implies the Pearson correlation coefficient. Meanwhile, the formula has two <em>variances</em> in the denominator, and the Pearson coefficient should have two <em>standard deviations</em>.</p>\n<p>Which coefficient was in fact used to rank the teams?</p>",
  "messages": [
    {
      "id": 52618,
      "postDate": "2014-08-29T07:26:53.690Z",
      "content": "<p>The evaluation page&nbsp;<a href=\"http://www.kaggle.com/c/MerckActivity/details/evaluation\">states</a>&nbsp;that a correlation coefficient is used. But which one? I believe the formula implies the Pearson correlation coefficient. Meanwhile, the formula has two <em>variances</em> in the denominator, and the Pearson coefficient should have two <em>standard deviations</em>.</p>\n<p>Which coefficient was in fact used to rank the teams?</p>"
    }
  ],
  "comments": [],
  "raw_markdown_by_id": {
    "52618": ""
  }
}