Tips and Techniques for Statistics and Quality Improvement

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

If you’ve ever wished for an easy way to add a custom analysis to Minitab’s interface, read on! Minitab’s new Python integration feature allows an avenue for easily running custom Python code via a button in the Minitab interface. If you’re not a programmer, fear not! I’m no programmer myself, so if I can do this, you can too.

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Data analysts don’t count sheep at night. We look for a nice, bell-shaped curve in their arc as they leap over the fence. That’s normal distribution, and it’s a starting point to understanding one of the most important concepts in statistical analysis: the central limit theorem.

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When facing a problem, you've most likely heard the saying "take the bull by the horns." It's often also easier said than done.

COVID-19's economic repercussions have forced businesses worldwide to deal with the phenomenon that occurs in multi-level supply chains where orders at the end of the supply chain, close to the customer, are amplified with each additional supply chain actor. This is called the bullwhip effect.

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Length of stay, defined as the time between hospital admission and discharge measured in days, is an aspect of care that can be costly for most healthcare systems if not approached properly. Optimizing patient flow, on the other hand, facilitates beneficial treatment, minimal waiting, minimal exposure to risks associated with hospitalization, and efficient use of resources such as hospital beds, medical equipment and...

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As we collect more and more observational data from our processes, we might need new tools to provide meaningful insights. You can add modern-day machine learning techniques alongside traditional statistical tools to analyze, improve and control your processes. Let's take a look at an example that starts with binary logistic regression and ends with Classification and Regression Trees (CART®).

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Content is available and accessible everywhere these days! A study from Nielsen found that adult Americans spend over 11 hours a day reading, listening, watching and interacting with media, which may even be higher now with so many individuals stuck at home. With the influx of content available, it might make you wonder: Is there a quantitative way to take a closer look at the text available to us?

Text mining, also...

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Trying to understand customer or patient behavior can be challenging. Oftentimes, researchers’ use survey data and frequently analyze it using regression in Minitab Statistical Software. But when the outcome variable is categorical rather than quantitative, interpreting the results of a logistic regression is not very straightforward or intuitive.

Another option for analyzing survey data in Minitab? Tap into the...

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When the data science buzz began around a decade ago, creating a predictive model was complicated work that only skilled programmers could accomplish. Today, new tools and new techniques are shifting the focus from programming details to building models that are robust, scalable and focused on creating business value.

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This Saturday is Leap Day, so some lucky 39-year-olds on the verge of 40 get to say they're only 10! What's the easiest way to determine the probability of being born on a certain day, like February 29? It's to assume every day of the year has an equal probability of being a birthday. But ... no surprise here ... the numbers actually disagree! 

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Histograms are great for summarizing several statistics. But whether you have enabled the Data Analysis Toolpak or you’re forging a path of formulas (COUNTIFs, AVERAGEs and STDEVs oh my!), creating a histogram in Excel isn’t always that great. We have developed Minitab Statistical Software to be your go-to histogram maker.

Let’s look at three ways you can do more with histograms in Minitab.

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