Sign Test versus WRS Test


C. V. Gogolak


The Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (NRC 1997) recommends that either the Sign test or WRS test be used to determine if the residual radioactivity within a survey unit meets the release criterion. There are fundamental differences between the Sign test and the WRS test, in how they were developed, and how they are applied. Some of the advantages and disadvantages of each test in particular circumstances are discussed in this paper. Also discussed is performing a Sign test on paired measurements when there are many diverse background materials present in a survey unit.


This abstract was presented at the 35th Annual Midyear Meeting, "Decommissioning and Environmental Restoration", MARSSIM 1 Session, 2/17/2002 - 2/20/2002, held in Orlando, FL.

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