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maximum permissible limits
-----Ursprüngliche Nachricht-----
Von: Ruth Sponsler <jk5554@YAHOO.COM>
An: Ted Rockwell <tedrock@CPCUG.ORG>; Dov Brickner <brickner@zahav.net.il>;
hflong@postoffice.pacbell.net <hflong@postoffice.pacbell.net>; jjcohen
<jjcohen@PRODIGY.NET>
Cc: Gibbs, S Julian <s.julian.gibbs@vanderbilt.edu>; Jacobus, John (OD/ORS)
<jacobusj@ors.od.nih.gov>; Radsafe Mail list <radsafe@list.vanderbilt.edu>
Datum: Sonntag, 21. Juli 2002 19:20
Betreff: Cancer deficiency clusters
>This reason is exactly why statistics profs advise
>people doing _research_ to use 2-sided confidence
>limits, and discourage the practice of 1-sided limits
>in most cases. [1-sided limits have some valid
>applications in non-research fields such as quality
>control and business management].
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This comment raises for me a very important question: What is the criterion,
whether a maximum permíssible concentration has been exceeded? There are two
extremes possible: Is it, that the measured value plus x sigma has to be
below the MPC or is it that the measured value has to be below the MPC plus
x sigma? The latter criterion is used in most regulations in Austria
regarding contaminants in food (x=2). The criterion defined by the Austrian
Standardisation Organisation (which has to be regarded as a recommendation
and has no real legislative power) is coherent with the first extreme. I
wonder, what the legislation is in other countries.
Best regards,
Franz
#
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