Sampling Bias in Business and Life
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WWII brass almost fell prey to "survival bias"
More Capability Confusion
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Armed with a little knowledge, you can confuse yourself
Credit: MorBCN
The Lost Art of Significant Digits
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The calculator is “more accurate” than the slide rule. Or is it?
What’s the Hurry?
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W. Edwards Deming once said, “A good organization will take five years to turn around. Most will take 10.”
Many talk about reducing variation to improve quality. Does that include human variation, where everyone takes a different approach to improving overall improvement processes? What would happen if this variation were reduced?
A History of Statistics
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Is Big Data too dangerous to use?
Credit: Kami Phuc
An F-Test for the 21st Century
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Sir Ronald Fisher, creator of the F-ratio, circa 1925
A recent question from a statistician in Germany led me to the realization that the F-test of analysis of variance (ANOVA) fame is in serious need of an update.
So Why Is It Called ‘Regression,’ Anyway?
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Statistical analysis: Let’s call it something grey and nebulous.
Did you ever wonder why statistical analyses and concepts often have such weird, cryptic names?
Vital Deming Lessons <em>Still</em> Not Learned
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Using charts like these risks treating common cause as special cause.
The Three-Way Chart
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Three-way chart for steel tensile strengths
How Taguchi Designs Differ From Factorial Designs
Genichi Taguchi is famous for his pioneering methods of robust quality engineering. One of the major contributions that he made to quality improvement methods is Taguchi designs.