Re: Sampling using summay data

[Bernard L Cohen <blc+@pitt.edu>]

	The justification for my data base on average radon levels in U.S.

counties is very lengthy. I can give references to my papers in which it

is discussed. It doesn't depend on any one set of measurements, like the

EPA's. The convincing thing to me is that all measurement sets had good

correlations, and each used independently gives the same results vs lung

cancer rates.



Bernard L. Cohen

Physics Dept.

University of Pittsburgh

Pittsburgh, PA 15260

Tel: (412)624-9245

Fax: (412)624-9163

e-mail: blc+@pitt.edu





On Sun, 25 Feb 2001, Harry Hinks wrote:



> 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.

> >

> >************************************************************************

> >The RADSAFE Frequently Asked Questions list, archives and subscription

> >information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html

> 

> _________________________________________________________________

> Get your FREE download of MSN Explorer at http://explorer.msn.com

> 

> ************************************************************************

> The RADSAFE Frequently Asked Questions list, archives and subscription

> information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html

> 



************************************************************************

The RADSAFE Frequently Asked Questions list, archives and subscription

information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html