note 89249 deleted from function.stats-variance by danbrown
| From: | danbrown@php.net | Date: | Fri, 27 Feb 2009 22:37:21 +0000 |
| Subject: | note 89249 deleted from function.stats-variance by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-151236@lists.php.net to get a copy of this message | ||
Note Submitter: Anonymous
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This will return surprising values for most users, since the default of sample=false is rather
unusual when speaking about variance.
Point is:
When using stats_variance($foo,TRUE) the sum is divided by n-1 while the default just divides it by
n. So when you expect your variance to be higher you probable wanted to divide by n-1, therefore
should set the second parameter =TRUE.