Tips and Techniques for Statistics and Quality Improvement

Blog posts and articles about using Minitab software in quality improvement projects, research, and more.

Cody Steele

My love for statistics isn’t very common. Even in my own family, the idea of statistics brought frowns to people’s faces. But you don’t have to live in fear of statistics!
Cody Steele

For one reason or another, the response variable in a regression analysis might not satisfy one or more of the assumptions of ordinary least squares regression. The residuals might follow a skewed distribution or the residuals might curve as the predictions increase. A common solution when problems arise with the assumptions of ordinary least squares regression is to transform the response variable so that the data do...

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Did you know about the Minitab Network group on LinkedIn? It’s the one managed by Eston Martz, who also edits the Minitab blog. I like to see what the members are talking about, which recently got me into some discussions about Raman spectroscopy data.

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I generally consider myself old-fashioned. I’m not particularly different on Halloween, where I dress up, pass out candy, sit down in front of the television to watch "It’s the Great Pumpkin, Charlie Brown" on ABC, and read Minitab blog posts from Halloweens past.

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Part of the fun of sports statistics is that many of the questions are unanswerable in an absolute sense. After a project to improve patient satisfaction scores at a hospital, you can and should measure patient satisfaction scores to determine that the increase met your goals. In sports, we don’t have exact comparisons from player to player, especially when their careers don’t even overlap. Thus, it wasn’t surprising...

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When I started out on the blog, I spent some time showing some data sets that would be easy to illustrate statistical concepts. It’s easier to show someone how something works with something familiar than with something they’ve never thought about before.

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Newsweek's recent article, The Environmental Disaster in Your Closet, led me (through Greenpeace's Detox Catwalk) to an interesting new data set on the web. Since I like public data, I thought I'd share some graphs I made from the Chinese Institute for Public and Environmental (IPE) affairs global online platform. The IPE website describes that their goal is "to expand environmental information disclosure to allow...

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It’s been almost 5 years since I used a quotation from Ghostbusters to introduce one of my early blog posts. But as we’re getting a few bits of entertainment news about the next installment in the Ghostbusters franchise, I thought it might be a good time to talk about busting ghosts in Minitab.

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When someone gives you data to analyze, you can gauge how your life is going by what you've received. Get a Minitab file, or even comma-separated values, and everything feels fine. Get a PDF file, and you start to think maybe you’re cursed because of your no-good-dirty-rotten-pig-stealing-great-great-grandfather and wish that you were someone else. For those of you who might be in such dire straits today, here are 3...

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If you’ve checked out What’s New in Minitab 17, you’ve had the chance to see that Conditional Formatting leads the list. If you’ve been reading the Minitab blog, you’ve had the chance to see demonstrations with Marvel’s Avengers and the Human Development Index. But you might not have had a chance to see that you can highlight large standardized residuals from a regression model and that the highlighted cells will...

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Minitab 17.2 is available. You can check out all of the new stuff on the What’s New Page, but I would say that a little demonstration is in order. Here are some new shortcuts that make arranging your data easier in Minitab 17.2.

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