Intoxicador

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Gage R&R Metrics: What Do They All Mean?

When you analyze a Gage R&R study in statistical software, your results can be overwhelming. There are a lot of statistics listed in Minitab's …

Data Science

Data Not Normal? Try Letting It Be, with a Nonparametric Hypothesis Test

So the data you nurtured, that you worked so hard to format and make useful, failed the normality test. Time to face the truth: despite your best …

Data Science

Regression versus ANOVA: Which Tool to Use When

Suppose you’ve collected data on cycle time, revenue, the dimension of a manufactured part, or some other metric that’s important to you, and you …

Anova

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 …

Data Science

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 …

How to conduct a Sequential DOE Study in Minitab

8 Expert Tips for Excellent Designed Experiments (DOE)

If your work involves quality improvement, you've at least <i>heard</i> of Design of Experiments (DOE). You probably know it's the most efficient way to …

Study Skills

How Effective Are Flu Shots?

Once again, with the arrival of autumn, it's time for a flu shot.I get a flu shot every year even though I know they’re not perfect. I figure they’re …

Twistaroma

Many variables affect the quality of the beer you enjoy. A beer's color depends on the malt used, while the aroma depends on the conditions of …

How to Identify the Distribution of Your Data using Minitab

Common Statistical Mistakes You Should Avoid

How to Correctly Interpret P Values

A Six Sigma Healthcare Project, part 1: Examining Factors with a Pareto Chart

Over the past year I've been able to work with and learn from practitioners and experts who are using data analysis and Six Sigma to improve the …

Six Sigma

How I Made Friends with Statistics

Statistics

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 …

Bootstrapping

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 …

Tests of 2 Standard Deviations? Side Effects May Include Paradoxical Dissociations

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 …

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 …

Tutorials

Are You Putting the Data Cart Before the Horse? Best Practices for Prepping Data for Analysis, ...

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 …

Data Science

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 …

Exploring Healthcare Data, Part 2

In the first part of 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 …

Data Science

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 …

Data Science

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 …

Data Visualization

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 …