Analyzing Trace-Level Plutonium Measurements: A Case Study In Data Transformations

Article

Blackwood, Larry G.   (1996, Marcel Dekker, Inc. and ASQC)   Idaho National Engineering Laboratory, Idaho Falls, ID

Quality Engineering    Vol. 9    No. 2
QICID: 11959    December 1996    pp. 249-258
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Article Abstract

The measurement of substances in very small quantities is a common occurrence in waste management applications involving radioactive material. Such trace-level measurement data often do not follow standard statistical distributions due to the convolution of lognormally distributed quantities of interest with normally distributed measurement error. This precludes the use of standard statistical analysis methods. One method of dealing with this problem is to find a mathematical transformation that produces results that are approximately normally distributed so that standard methods of analysis can be applied. Using as an example the measurement of plutonium in 55-gal waste drums, this article describes procedures for obtaining suitable transformations for such data.

Keywords

Statistical methods,Normality,Case study,Transformation


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