note 101528 deleted from function.stats-standard-deviation by danbrown
| From: | danbrown@php.net | Date: | Wed, 22 Dec 2010 17:52:09 +0000 |
| Subject: | note 101528 deleted from function.stats-standard-deviation by danbrown | ||
| References: | 1 | Groups: | php.notes |
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Note Submitter: The Naughty Badger
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The $sample parameter dictates whether n, or n-1 should be used to calculate the variance. When set
to true, n-1 is used. You should do this when you pass a sample of data, rather than the entire
dataset, or if you wish to use the standard deviation for extrapolation of future values.
http://www.graphpad.com/faq/viewfaq.cfm?faq=1382