Data Points
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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Data Points
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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Data Points
Q: What is a confidence interval? A. Click HERE to download the article and read the answer. 
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Data Points
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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Data Points
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 that another sample from the lot would also pass the… more
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Data Points
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. 
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Data Points
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.
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Data Points
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: Another standard can now be used to avoid the masking… more
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Data Points
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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Data Points
Q. How are precision and uncertainty related? A. Click HERE to download the full article and read the answer. 
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