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Combat Arms KDR

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Combat Arms KDR
Nikkey
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#7
2009-03-20, 08:48 PM
Hazzy Wrote:Given two means and StdDev of two independent samples, how do I find the StdDev of the ratio of the two samples?

Well, we know that SD(X) is the square-root of VAR(X).

First of all, take the SD of both samples and square them. Now you got the Variance of both samples. Let's say we're going to find the Variance for the combination. Using the variance-formula (Though, it was expressed more detailed than needed, sorry about that.), we find the variance for both of the samples. Now take the root of the variance to find the StdDev:

[Image: 38617040.gif]

Hope that helps you. It's kinda like Pytagoras actually.
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Messages In This Thread
Combat Arms KDR - by Hazzy - 2009-03-20, 05:45 PM
Combat Arms KDR - by JoeTang - 2009-03-20, 06:55 PM
Combat Arms KDR - by Russt - 2009-03-20, 07:01 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 07:02 PM
Combat Arms KDR - by Nikkey - 2009-03-20, 07:42 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 08:34 PM
Combat Arms KDR - by Nikkey - 2009-03-20, 08:48 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 09:11 PM
Combat Arms KDR - by Nikkey - 2009-03-20, 09:18 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 09:25 PM
Combat Arms KDR - by Cyadd - 2009-03-20, 10:54 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 11:07 PM
Combat Arms KDR - by Cyadd - 2009-03-20, 11:15 PM
Combat Arms KDR - by Russt - 2009-03-20, 11:16 PM
Combat Arms KDR - by Hazzy - 2009-03-20, 11:26 PM
Combat Arms KDR - by Nikkey - 2009-03-21, 05:39 AM
Combat Arms KDR - by Hazzy - 2009-03-21, 03:09 PM
Combat Arms KDR - by Nikkey - 2009-03-21, 03:45 PM
Combat Arms KDR - by Russt - 2009-03-21, 03:47 PM
Combat Arms KDR - by Flaxative - 2009-04-03, 06:58 PM

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