Re: Sampling using summay data

["Harry Hinks" <harryhinks@hotmail.com>]

Prof. Cohen,

Does agreement with the EPA and other surveys that peformed limited testing 
per county justify using summary data for risk analysis (or to test the 
LNT)?  THE EPA reports said that their surveys were just an indicator of 
where elevated radon levels may occur.

Harry

harryhinks@hotmail.com


>From: Bernard L Cohen <blc+@pitt.edu>
>Reply-To: radsafe@romulus.ehs.uiuc.edu
>To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
>Subject: Re: Sampling using summay data
>Date: Sat, 24 Feb 2001 19:28:24 -0600 (CST)
>
>On Fri, 23 Feb 2001, Harry Hinks wrote:
>
> > It is in the math.  I didn't realize Prof. Cohen performed statistical
> > sampling when choosing which house to test in a given area?  I thought 
>the
> > data set came from individuals who wanted to test for radon becasue of
> > health concerns or thought they may be living in a high radon area. I 
>wonder
> > if people who have increased concern about their health would have lower
> > cancer rates?
>
>	-Several pages of my papers deal with the issue of justifying my
>average radon levels in various counties. I can give references if
>desired.
>Basically they deal with correlations between results from various studies
>done by different state agencies, EPA, and careful random selection
>studies done by my group, and my entire file of measurements filtered for
>elimination of the type of bias you suggest.
>I was really shocked to find how close these correlations were, and that
>is what made me go on with this study.
>
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