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Question Standard deviation of energy deposited 

Forum: Run Management
Date: 19 Jul, 2010
From: Neil Fazel <Neil Fazel>

Hello. I hope this is the right forum for a question on statistics.

I'm using G4ElectronIonPair to find the number of ion pairs in a helium ionization chamber. I see that the number of ion pairs created has large fluctuation (i.e. the energy deposited by the electron has large fluctuation). For example, for 10000 electrons (/run/beamOn 10000), the standard deviation of the ion pair count is often more than 100%. I looked at the calculation and see that there are outliers on either side of the deposited energy distribution which are the source of the large variance.

Is this to be expected? Can such large standard deviations be used to draw error bars?

Thank you, Neil

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1 Idea: Re: Standard deviation of energy deposited   (Vladimir Ivanchenko - 08 Oct, 2010)
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