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Have It Your Way: How to Create a Custom Toolbar in Minitab
Depending on how often and when you use statistical software like Minitab, there may be specific tools or a group of tools you find yourself using over and over again. You may have to do a monthly...
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Understanding t-Tests: t-values and t-distributions
T-tests are handy hypothesis tests in statistics when you want to compare means. You can compare a sample mean to a hypothesized or target value using a one-sample t-test. You can compare the means of...
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3 Tips for Importing Excel Data into Minitab
Getting your data from Excel into Minitab Statistical Software for analysis is easy, especially if you keep the following tips in mind. Copy and Paste To paste into Minitab, you can either right-click...
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Merge All Your Data At Once
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...
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Manipulating Your Survey Data in Minitab
As a recent graduate from Arizona State University with a degree in Business Statistics, I had the opportunity to work with students from different areas of study and help analyze data from various...
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Beware the Radar Chart!
Along with the explosion of interest in visualizing data over the past few years has been an excessive focus on how attractive the graph is at the expense of how useful it is. Don't get me wrong...I...
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What's a Moving Range, and How Is It Calculated?
We often receive questions about moving ranges because they're used in various tools in our statistical software, including control charts and capability analysis when data is not collected in...
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Exploring Healthcare Data, Part 1
Working with healthcare-related data often feels different than working with manufacturing data. After all, the common thread among healthcare quality improvement professionals is the motivation to...
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Exploring Healthcare Data, Part 2
In the first partof this series, we looked at a case study where staff at a hospital used ATP swab tests to test 8 surfaces for bacteria in 10 different hospital rooms across 5 departments. ATP...
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Understanding t-Tests: 1-sample, 2-sample, and Paired t-Tests
In statistics, t-tests are a type of hypothesis test that allows you to compare means. They are called t-tests because each t-test boils your sample data down to one number, the t-value. If you...
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Novel Uses of the Pareto Chart Through Human History
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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3 Ways to Graph 3 Variables in Minitab
You can use contour plots, 3D scatterplots, and 3D surface plots in Minitab to view three variables in a single plot. These graphs are ideal if you want to see how temperature and humidity affect the...
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Tests of 2 Standard Deviations? Side Effects May Include Paradoxical...
Once upon a time, when people wanted to compare the standard deviations of two samples, they had two handy tests available, the F-test and Levene's test.Statistical lore has it that the F-test is so...
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Is Stephen Curry the Best NBA Point Guard Ever? Let's Check the Data
by Laerte de Araujo Lima, guest blogger The NBA's 2015-16 season will be one for the history books. Not only was it the last season of Kobe Bryan, who scored 60 points in his final game, but the Golden...
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An Overview of Discriminant Analysis
Among the most underutilized statistical tools in Minitab, and I think in general, are multivariate tools. Minitab offers a number of different multivariate tools, including principal component...
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Understanding Analysis of Variance (ANOVA) and the F-test
Analysis of variance (ANOVA) can determine whether the means of three or more groups are different. ANOVA uses F-tests to statistically test the equality of means. In this post, I’ll show you how ANOVA...
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Understanding Bootstrapping and the Central Limit Theorem
For hundreds of years, people having been improving their situation by pulling themselves up by their bootstraps. Well, now you can improve your statistical knowledge by pulling yourself up by your...
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Creating a Fishbone Diagram in Minitab
While many Six Sigma practitioners and other quality improvement professionals like to use the Fishbone diagram in Quality Companion for brainstorming because of its ease of use and integration with...
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See How Easily You Can Do a Box-Cox Transformation in Regression
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...
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Are You Putting the Data Cart Before the Horse? Best Practices for Prepping...
Do you recall my “putting the cart before the horse” analogy in part 1 of this blog series? The comparison is simple.We all, at times, put the cart before the horse in relatively innocuous ways, such...
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