The MARSSIM Sign test is a one-sample, nonparametric statistical test used to determine compliance with a release criterion (Action Level, i.e., DCGLw) when the radionuclide of concern is not present in background. The purpose of a MARSSIM sign test is to test a hypothesis involving the true mean or median of a population against an Action Level. Note that using this test for the mean assumes the distribution of the survey unit population is symmetrical. When the distribution of the population in the Survey Unit is symmetrical, the mean and the median are the same. When the distribution is not symmetrical, the Sign test is a true test for the median, and an approximate test for the mean. This assumption and the appropriate use of the sign test for final status surveys is discussed in Multi-Agency Radiation Survey and Site Investigation Manual (MARSSIM) (EPA 2000). This document is currently available at: https://www.epa.gov/radiation/multi-agency-radiation-survey-and-site-investigation-manual-marssim
MARSSIM Sign One Analyte at a Time Sampling
MARSSIM Sign Surface Soil Unity Rule Sampling