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Data Points
Solving Statistics Problems: How to Work with Difficult Data
Q: I have a difficult data set that I want to use to help solve a problem. I am finding it difficult to find something of potential value. Can you help? A: Difficult data goes beyond what is called messy data, which typically entails inconsistent,… more
Industry sectors:
Quality

Data Points
The Meaning of Statistical Confidence
Q. How confident can I be that (fill in the blank)? A. With enough research, a good design, and a controlled process, I can be pretty confident. But this is not a statistics question. The term statistical confidence typically appears with the… more
Industry sectors:
Quality

Data Points
Revisiting Statistical Intervals: Common Statistical Intervals, Interval Selection, and Examples
Q: Can I infer something about a population or process based on a point estimate? A: It is risky to use a point estimate based on a single sample of data to infer something about a population or process since it does not account for sources of… more
Industry sectors:
Quality

Data Points
What are Certified Reference Materials?
The use of reference materials in the laboratory is widespread. These materials are most often used as control samples for control charting, drift correction, second-source verification of calibration, method validation, evaluation of method bias… more
Industry sectors:
Quality