Listmembers:
I came across this formula for standard deviation.
Is it correct? What is its source? How can I derive it from the well known
formula?
sq rt. sum [ (sum (Xsubi x Xsubi) - 2 x Xbar x sum (Xsubi) + n x Xsubi x
Xsub i) / (n-1)]
where lower case x represent multiplication.
Thank you for your help.
Stan Alekman
"Torture the numbers long enough and they will surrender." Professor Donald
J. Wheeler.
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