![]() To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice. You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Continue without accepting’ or ‘Customise Cookies’ to decline these cookies, make more detailed choices or learn more. Third parties use cookies for the purposes of displaying and measuring personalised advertisements, generating audience insights, and developing and improving products. This includes using first- and third-party cookies which store or access standard device information such as a unique identifier. If you agree, we will also use cookies to complement your shopping experience across Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences, and to provide our services, as detailed in our Cookie Notice.
0 Comments
This level of risk is called the significance. ![]() The process of data dredging involves testing multiple hypotheses using a single data set by exhaustively searching-perhaps for combinations of variables that might show a correlation, and perhaps for groups of cases or observations that show differences in their mean or in their breakdown by some other variable.Ĭonventional tests of statistical significance are based on the probability that a particular result would arise if chance alone were at work, and necessarily accept some risk of mistaken conclusions of a certain type (mistaken rejections of the null hypothesis). This is done by performing many statistical tests on the data and only reporting those that come back with significant results. ![]() ![]() Misuse of data analysis A humorous example of a result produced by data dredging, showing a coincidental correlation between the number of letters in Scripps National Spelling Bee's winning word and the number of people in the United States killed by venomous spiders.ĭata dredging (also known as data snooping or p-hacking) is the misuse of data analysis to find patterns in data that can be presented as statistically significant, thus dramatically increasing and understating the risk of false positives. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |