Standardization News

Data Points
Laboratory-Specific Bias and Its Effect on Precision Statements
Q. How does laboratory bias in an interlaboratory study affect precision statements? A. Click HERE to download the full article and read the answer. 
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Data Points
Finite Population Sampling (Part 3 of 3)
Q: How do we handle zero defects or non-conformities when sampling a finite population of objects? A. Click HERE to download the article and read the answer. 
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Why Is It Still Needed?
Q: If process improvement initiatives such as Six Sigma and gurus such as W. Edwards Deming, Ph.D., emphasize process control to ensure quality to customers, then why do we need acceptance sampling? A. Click HERE to download the article and read the... more
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Sampling from a Process (Part 1 of 3)
Q: What does the phrase “zero defects” mean, and what can we say about a process for which this phrase has been applied? A. Click HERE to download the article and read the answer. 
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Non-Conformities When Sampling a Continuum (Part 2 of 3)
Q: How do we handle zero defects or non-conformities when sampling a continuum? A. Click HERE to download the article and read the answer.   
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Data Points
How to Use, Measure and Control IP
Q: What is the intermediate precision of a test method? How is it measured and used? A. Click HERE to download the article and read the answer. 
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The Benefits of E691
Q: ASTM International standard E691, Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method, recommends a particular design, but other ASTM committees suggest alternative designs. What are the benefits of the... more
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A Simple but Useful Statistical Computation
Q: What exactly are z-scores and how are these statistics used in practice? A. Click HERE to download the article and read the answer. 
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Part 1: The Confidence Interval
Q: What is a confidence interval? A. Click HERE to download the article and read the answer. 
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Practical and Philosophical Considerations
Q: How can you test for an outlier, and Is there an ASTM standard for this practice? A. Click HERE to download the article and read the answer. 
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