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Technical issues related to the ERICA Tool (on Facilia website)

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Posted: 03/12/2010

What distribution whould I use?

From:
Marko Černe
Jožef Stefan Institute
Slovenia

Question:
I would like to know, if the assessment would be satisfactory, if I use an average value and thus use an exponential distribution or should I use the average + SD and use lognormal? An average value is an average of 12 samples taken each month through year from one monitoring place. So SD are calculated from 12 samples from one monitoring place and are not related to different places in specific
river. The assessment with average value without SD should represent satisfactory results compared to average + SD in my case? Dose rates should be in the same range when using exponential or lognormal?

Answer:
Easy question first your mean estimate when using a mean and pdf in Tier 3 will be similar to estimate using Tier 2 and inutting a mean value only.

Answered by Nick Beresford 08/12/2010

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Posted: Asked during training course 24-26th November 2011

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