Standards and Statistics



Standards And Statistics

Test Method (Im)precision

How to Account for It
Q: How can you account for test method (im)precision in the adjudication of a petroleum product specification conformance dispute? Click here to... more
Industry Sectors: 
Quality


Standards And Statistics

Is It One or Two Groups of Data?

How to Determine It
Q: When I look at my data it appears that instead of one group of data I see two. How can I determine statistically if there are one or two groups of... more
Industry Sectors: 
Quality


Standards And Statistics

Statistical Intervals: Nonparametric

Part 2
Q. What considerations are there with nonparametric statistical intervals when the underlying distribution varies? Click here to download the full... more
Industry Sectors: 
Quality


Standards And Statistics

Statistical Prediction intervals

Applying the Intervals to Attribute Data
Q. What considerations are there with statistical prediction intervals when the underlying distribution is known to be based on attribute data? Click... more
Industry Sectors: 
Quality


Standards And Statistics

How Normal Is Normal?

Using a Q-Q Plot
Q. How can I determine if my data comes from a normal distribution? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

Quantile Estimation

When More than the Mean and the Standard Deviation Are Needed
Q. Which method of quantile estimation should be used? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

Easy Estimation of Measurement Uncertainty

E2554 and Control Chart Techniques
Q. How can we easily obtain an estimate of measurement uncertainty? Click here to download the full article... more
Industry Sectors: 
Quality


Standards And Statistics

Assessing crack Detection capability

Statistical Models in Practice
Q. What statistical procedure is used to determine the typical crack size that can be detected with a given probability? Click here to download the... more
Industry Sectors: 
Quality


Standards And Statistics

Can a Moving Average of the Data Be Deceptive?

Taking a closer look at this approach to data sets.
Q. Sometimes I want to take a moving average of my data to reduce the noise I am seeing, but can I actually fool myself? Click here to download the... more
Industry Sectors: 
Quality


Standards And Statistics

Inspection Redundancy – Part 1

Why multiple or redundant inspections make sense.
Q. What is the purpose of multiple or redundant inspections? Click here to download the full article... more
Industry Sectors: 
Quality

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