Standard Deviation Formula without MeanDate: 10/03/2002 at 22:41:30 From: Ryan Mabry Subject: Standard Deviation without Mean Is there a formula for calculating the standard deviation without using the mean? Date: 10/10/2002 at 09:01:06 From: Doctor Pepper Subject: Re: Standard Deviation without Mean Hi Ryan - To compute the standard deviation without computing the mean, you can use this formula: std dev = sqrt [(B - A^2/N)/N] where A is the sum of the data values; B is the sum of the squared data values; N is the number of data values. Best wishes! - Doctor Pepper, The Math Forum <http://mathforum.org/dr.math/ |
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