Open Daily: 10am - 10pm | Alley door pickup 10am - 7pm 3038 Hennepin Ave Minneapolis, MN
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  • Open Daily: 10am - 10pm
    Alley-side Pickup: 10am - 7pm

    3038 Hennepin Ave Minneapolis, MN
    612-822-4611

Open Daily: 10am - 10pm | Alley-side Pickup: 10am - 7pm
3038 Hennepin Ave Minneapolis, MN
612-822-4611
Environmental Radiation Data: Report 153

Environmental Radiation Data: Report 153

Agency, U. S. Environmental Protection

Paperback

General Nature

ISBN10: 1500823279
ISBN13: 9781500823276
Publisher: Createspace
Published: Oct 9 2014
Pages: 42
Weight: 0.27
Height: 0.09 Width: 8.50 Depth: 11.02
Language: English
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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