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le Battelle
Pacific Northwest Laboratories
:
Chewetak
Banelle Boulevard
Richland, Washington 99352
19 7 a.
Telephone(509)
Telex 36921
August 28, 1972
409771
Dr. Don Hendricks
Director of Radiological Operations Division
Nevada Operations Office
USAEC
Box 14100
Las Vegas, Nevada
89114
Dear Don:
This letter is to sunmarize our understanding of the sampling aspects
Of the forthcoming Eniwetok survey.
I assume there will be some further
discussion of this, and this letter is intended to serve as a basis for
such discussions.
I have had several long talks with Oliver Lynch by
telephone, and Dick Gilbert spent a day with him last week.
We very much
appreciate his cooperative spirit and have been much impressed with his
understanding of the problems and thorough-going approach to the survey.
Probably Ollie will not agree with all of our suggestions, since he has to
implement them in the field.
Having had occasion to modify my own survey
designs in the field, I am aware of the kinds of things that come up.
However, we do need to try to spel] out some of the consequences of particular
modifications where this is possible.
Mostly these have to do with what
random sampling amounts to, and the effects of deviations from a truly
random sample.
There is ample evidence that a representative set of sampling
locations cannot be selected by "eyebail".
There are quite a few practical-
minded people who don't believe that statement, but we've got enough to do
at the moment that I don't want to spend any time on that old argument.
Nor
can we say exactly what the consequences of departures from random sampling
scheiwes wil] be.
We will suggest some possibilities, and perhaps it is
sufficient to note that if the results of this study have to be somehow
defended in "public" they had better be based on a defensible scheme.
The balance of this letter will deal with some specific topics.
Some
of these we haven't looked ini in the-detail we feel advisable, but time
is pressing on.
In what follows we assume that there are reasons for wanting
to make specific statements either about specific parts of an island, a single
island, or about groups of islands. Our purpose is to try to provide some