Standardization News

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. 
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... read more
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. 
Q: What is a confidence interval?A. Click HERE to download the article and read the answer. 
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. 
Q. Lots are released based on comparing test results from a sample to lot acceptance procedure criteria. If a set of test results meets the lot acceptance procedure criterion, how can I be assured... read more
Q. How can I determine if my data comes from a normal distribution?A. Click HERE to download the full article and read the answer. 
Q. What statistical procedure is used to determine the typical crack size that can be detected with a given probability?A. Click HERE to download the full article and read the answer.
Q. I suspect that my data contain more than one outlier. Is there a preferred technique to use to isolate them?Click HERE to download the full article and read the answer.Editor’s Note:... read more
Q. What is non-inferiority, and how is this related to equivalence in comparing two sets of test results?A. Click HERE to download the full article and read the answer. 

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