Data Points
Q. If there is no information on how results should be interpreted when comparing a test result to a specification limit, should we use the absolute or the rounding method?
A. The standard practice for using significant digits in test data to… more
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Participation in interlaboratory comparison studies is of high importance for laboratories. Accredited laboratories, and many laboratories that provide testing within a regulatory framework, have a requirement to demonstrate their performance by… more
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The use of reference materials in the laboratory is widespread. These materials are most often used as control samples for control charting, drift correction, second-source verification of calibration, method validation, evaluation of method bias… more
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Q. What are the basic concepts of measurement?
A. ASTM International members have a broad range of backgrounds, which are necessary for their individual fields. However, not everyone may have the same level of familiarity with measurement quality… more
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The Poisson distribution is one of the most important distributions in all of statistics. It is a discrete distribution and counts certain types of events in time or over some other observational region such as area, volume, or distance. The… more
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Q: How can probabiity of detection (POD) be estimated for a given target size using find/no-find data from a nondestructive testing (NDT) system?
A: In the aerospace industry, an NDT inspector may be required to find a crack-like defect of a given… more
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When I received my undergraduate degree in chemistry, I never expected to use statistics to the degree I do today. My first career job was in a quality lab for a pharmaceutical manufacturer. I thought the full extent of my mathematics usage would… more
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Q. In which other situations does the alpha risk of multiple tests need to be controlled?
A. Click HERE to download the full article and read the answer.
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Q. How does equivalence testing avoid a multiplicity correction by utilizing the IUT principle?
A. Click HERE to download the full article and read the answer.
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Q. What is a p-value the probability of?
A. Click HERE to download the full article and read the answer.
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