Content by Patrick Runkel

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Patrick Runkel
It’s usually not a good idea to rely solely on a single statistic to draw conclusions about your process. Do that, and you could fall into the clutches of the “duck-rabbit” illusion shown below...
Patrick Runkel's picture
Patrick Runkel
Did you ever wonder why statistical analyses and concepts often have such weird, cryptic names? One conspiracy theory points to the workings of a secret committee called the ICSSNN. The...
Patrick Runkel's picture
Patrick Runkel
It’s been called a “demographic watershed.” During the next 15 years alone, the worldwide population of individuals aged 65 and older is projected to increase more than 60 percent, from...
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Patrick Runkel
What does the eyesight of a homeless person have in common with complications from dental anesthesia? Or with reducing side-effects from cancer? Or monitoring artificial hip implants? These are all...
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Patrick Runkel
The Pareto chart is a graphic representation of the 80/20 rule, also known as the Pareto principle. If you’re a quality improvement specialist, you know that the chart is named after the early 20th...
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Patrick Runkel
About a year ago, a reader asked if I could try to explain degrees of freedom in statistics. Since then, I’ve been circling around that request very cautiously, like it’s some kind...
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Patrick Runkel
I live with a German national, who often tells me that we Americans spend way too much of our lives at work. He also frequently comments that we work much less efficiently than Germans do, during...
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Patrick Runkel
Did you ever wonder why statistical analyses and concepts often have such weird, cryptic names? One conspiracy theory points to the workings of a secret committee called the International Committee...
Patrick Runkel's picture
Patrick Runkel
I’ve never understood the fascination with selfies. Maybe it’s because I'm over 50. After surviving the slings and arrows of a half a century on Earth, the minute or two I spend in front of the...
Patrick Runkel's picture
Patrick Runkel
It’s usually not a good idea to rely solely on a single statistic to draw conclusions about your process. Do that, and you could fall into the clutches of the “duck-rabbit” illusion shown below. If...