
Reference Type: Supported, Category: Math Functions, Integration Agreement: 10105
This extrinsic function returns the standard deviation. Standard deviation is defined as:
"A measure of variability equal to the square root of the arithmetic average of the squares of the deviations from the mean in a frequency distribution."^{1}
(^{1}Definition as taken from: Webster's New World College Dictionary, Fourth Edition; Michael Agnes, Editor in Chief; David B. Guralink, Editor in Chief Emeritus; Copyright 2001, 2000, 1999 by IDG Books Worldwide, Inc.; ISBN 0028631188.)
$$SD^XLFMTH(%s1,%s2,%n)
%s1: 
(required) Sum. 
%s2: 
(required) Sum of squares. 
%n: 
(required) Count. 
returns: 
Returns the standard deviation. 
>S X=$$SD^XLFMTH(5,25,2) >W X 3.53553390593
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