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Guest Blogger

Blog posts from people who are applying statistics and data analysis to their quality improvement projects and personal interests. Would you like to submit a post? Contact publicrelations(at)minitab.com 

by Bob Yoon, guest blogger Yesterday's post shared how an analysis of Bill Belichick's hoodie-wearing patterns found no statistically significant difference in New England Patriots wins if he wore sleeved or sleeveless hoodies, nor if the hoodie were from Reebok or Nike. Since these hypothesis tests failed to reject the null hypothesis, I combined these factors under “grey hoodie” and started a new... Continue Reading
by Bob Yoon, guest blogger As a longtime Boston sports fan, these past 12 years have spoiled me for the rest of my life—seven titles amongst all four of the major sports teams and over 30 playoff berths. This era of dominance began with the New England Patriots, and the one man at the center of the team’s ascent to greatness is Coach Bill Belichick. Over the years, his choice in wardrobe has... Continue Reading

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by Alex Orlov, guest blogger While it has been called the "million-dollar methodology" for the significant investment sometimes required to deliver results, Six Sigma has a wealth of practices that can be adapted to small and medium industries, home businesses and even personal finances.  Organizations have used Six Sigma as a reliable part of the quality improvement process since 1986. And while a... Continue Reading
by Matthew Barsalou, guest blogger Process capability analysis using Minitab Statistical Software’s Capability SixpackTM can be taught using a catapult. A process capability analysis is performed to determine if a process is statistically capable. In my last blog post, I collected data from a first run of catapult results and found that the run not only had a large amount of variability, it also... Continue Reading
by Matthew Barsalou, guest blogger We can use a simple catapult to teach process capability analysis using Minitab Statistical Software’s Capability SixpackTM. Here's how. A process capability analysis is performed to determine if a process is statistically capable. Based on the results of the capability study, we can estimate the amount of defective components the process would produce. However, a pr... Continue Reading
by Cory Heid, guest blogger Almost all of us have tried a Tootsie Pop at some point. I’m willing to bet that most of us also thought, “I wonder how many licks it does take to get to the center of the Tootsie Pop?” If you haven’t wondered about this, here’s the classic commercial that may get you more curious: Personally, I was not very satisfied with the owl's answer of “3,” so I decided to continue... Continue Reading
by Matthew Barsalou, guest blogger In my last post, I shared my plans for building a simple do-it-yourself catapult for performing experiments to practice using design of experiments (DOE).  That's the completed catapult there on the right. If you want to build your own, here are my plans and instructions in a PDF.   Now that my catapult is built, I have one last step to complete:  to find the... Continue Reading
by Matthew Barsalou, guest blogger I needed to find a way to perform experiments to practice using design of experiments (DOE), so I built a simple do-it-yourself (DIY) catapult. The basic plan for the catapult is based on the table-top troll catapult from http://www.stormthecastle.com/catapult/how-to-build-a-catapult.htm. My catapult is not as attractive as the troll catapult; my goal was to build... Continue Reading
by Robb Richardson, guest blogger One of the things that I love most about my job is that I get to help educate, coach, and develop others on topics such as continuous improvement and data analysis. In that capacity, one of the most frequently seen challenges is that team members and managers want to react to every data point. Their intentions are noble – but doing so is almost always an unnecessary... Continue Reading
by Matthew Barsalou, guest blogger In Jim Frost’s article “How to Be a Ghost Hunter with a Statistical Mindset,” he correctly pointed out the difficulties in distinguishing small effects from natural variation. However, he did not mention the benefits of doing measurement system analysis (MSA) in both ghost hunting as depicted by his example and in the statistical study using Minitab.In industrial... Continue Reading
by Manikandan Jayakumar, guest blogger In an earlier post, I discussed how to collect data in a Design of Experiments (DOE) to optimize the value of an attribute or categorical response (Pass/Fail, Accept/Reject, etc.).  I then showed how to convert the collected data into proportions and apply the arcsine transformation using built-in calculator in Minitab Statistical Software.    Now we’re ready... Continue Reading
by Manikandan Jayakumar, guest blogger We use Design of Experiments (DOE) to optimize the value of a response (Y) by simultaneously changing the values of several factors (X’s). The response will often be a continuous variable, but in some scenarios you need to optimize an attribute or categorical response (Pass/Fail, Accept/Reject, etc.).  Collecting the Data for an Attribute Response DOE Let’s see... Continue Reading