Standards and Statistics



Standards And Statistics

Dealing with Outliers

How to Evaluate a Single Straggler, Maverick, Aberrant Value
Q. How do you determine if a value is truly an outlier and how do you decide whether or not to proceed with the data analysis? Click here to download... more
Industry Sectors: 
Quality


Standards And Statistics

Reporting Test Results

Determining Significant Digits and Rounding Properly
Q: How many significant digits should I use when reporting my test results and comparing those results with specification limits? Click here to... more
Industry Sectors: 
Quality


Standards And Statistics

What Are Repeatability and Reproducibility?

Part 3: Their Meaning in Gage r&R Methodology
Q. How are repeatability and reproducibility applied in gage r&R methodology? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

Sample Sizes

Considering the Number of Items to Include in a Sample
Q: How many items from a lot should I sample to determine the average value for a property of the lot? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

What Are Repeatability and Reproducibility?

Part 1: A D02 Viewpoint for Laboratories
Q: Many ASTM standard test methods contain repeatability and reproducibility statements and values. What is the conceptual difference between... more
Industry Sectors: 
Quality


Standards And Statistics

What Are Repeatability and Reproducibility?

Part 2: The E11 Viewpoint
Q: Many ASTM standard test methods contain repeatability and reproducibility statements and values. What variations can be expected? What is the... more
Industry Sectors: 
Quality


Standards And Statistics

Laboratory Bias

Laboratory-Specific Bias and Its Effect on Precision Statements
Q. How does laboratory bias in an interlaboratory study affect precision statements? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

What Do We Mean by “Zero Defects”?

Part 3 of 3: Finite Population Sampling
Q: How do we handle zero defects or non-conformities when sampling a finite population of objects? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

Acceptance Sampling

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... more
Industry Sectors: 
Quality


Standards And Statistics

What Do We Mean by “Zero Defects”?

Part 1 of 3: Sampling from a Process
Q: What does the phrase “zero defects” mean, and what can we say about a process for which this phrase has been applied? Click here to download the... more
Industry Sectors: 
Quality

Pages