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Environmental Radiation Data: Report 153 (en Inglés)
Agency, U. S. Environmental Protection (Autor)
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Createspace Independent Publishing Platform
· Tapa Blanda
Environmental Radiation Data: Report 153 (en Inglés) - Agency, U. S. Environmental Protection
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Reseña del libro "Environmental Radiation Data: Report 153 (en Inglés)"
Every laboratory measurement involves uncertainty. When there is little or no radioactivity in a sample, one consequence of measurement uncertainty is the possibility of obtaining a measured value that is less than zero. Such a negative result occurs when random effects in the measure- ment process cause the measured value for the sample to be less than that of the blank or back- ground, which is subtracted from it. From April 1991 to December 1995, negative results were reported as "not detected" or "ND," and gamma analysis results that were less than their estimated measurement uncertainties were also reported as "ND." In January 1996, both of these practices were discontinued. Although negative activities are physically impossible, the inclusion of negative results in the report allows better statistical analysis of the data.
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