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Correlation Is not Causation: Why Running the Football Doesn’t Cause You to...
I know we lost by 2 touchdowns, but if only you had given Peterson 3 more carries we would have won! Last week, ESPN ran an article about why the running game still matters. They used statistics to...
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Tooltips, Assistant Menu, and Help: The 5 Coolest Things You Didn't Know You...
Minitab Statistical Software displays the information that you need in the analyses that you perform, but it’s possible that you might want to capture information in a different place, or even a...
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Statistically, How Thankful Should We Be: A Look at Global Income...
In the United States, our Thanksgiving holiday is fast approaching. On this day, we give thanks for the good things in our lives. For this post, I wanted to quantify how thankful we should be. Ideally,...
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Statistically, How Thankful Should We Be: A Look at Global Income...
In my previous post, I looked at how personal income levels fit into the global distribution of incomes. Although, I’d be the last person to suggest that a higher income guarantees more...
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The Value Stream Map: It's Been Around Longer than You Think
In looking for the answer to an unrelated quality improvement question the other day, I ran across a blog post that answers a question I'd had for a while: what's the origin of the value stream map? A...
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Avoiding a Lean Six Sigma Project Failure, part 4
In my first post in this series, I mentioned that we reached out to our customers who are practitioners in the field of quality improvement to better understand how they complete projects, what tools...
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Doggy DOE Part III: Analyze This!
What factors significantly affect how quickly my couch-potato pooch obeys the “Lay Down” command? The cushiness of the floor surface? The tone of voice used? The type of reward she gets? How hungry...
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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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Normality Tests and Rounding
All measurements are rounded to some degree. In most cases, you would not want to reject normality just because the data are rounded. In fact, the normal distribution would be a quite desirable model...
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Will Playoffs Make College Football's Regular Season Less Exciting?
If you're scared this is what the playoff will look like, just remind yourself that Georgia Southern beat Florida this year without completing a pass. Auburn beat Alabama this past weekend in one of...
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Fix Problems in Regression Analysis with Partial Least Squares
Face it, you love regression analysis as much as I do. Regression is one of the most satisfying analyses in Minitab: get some predictors that should have a relationship to a response, go through a...
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Regression Analysis Tutorial and Examples
I’ve written a number of blog posts about regression analysis and I think it’s helpful to collect them in this post to create a regression tutorial. I’ll supplement my own posts with some from my...
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Is There a World Cup "Group of Death"?
Much is made following the World Cup draw every four years over which group is the “group of death.” This is generally considered to be a really difficult group that is tough to advance from,...
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Does Peyton Manning Play Worse in Cold Weather?
If you’re a believer that Peyton Manning plays worse in cold weather, the last few weeks have only strengthened your resolve. In 3 of his last 4 games, he’s played in temperatures below 40 degrees, and...
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Quantum Estimates: Where Angels Fear to Tread
This close to the holidays, it’s hard to stay focused on work. I should be writing a post about useful estimation tools for quality statistics. But all those yuletide carols about hosts of angels...
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Use the Minitab Assistant to Choose a Graph
Everyone loves Minitab’s Assistant. My favorite bit, as I’ve shown with the Gage R&R Study, is the way that the Assistant puts all the results you need into reports that are easy to understand and...
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How High Should R-squared Be in Regression Analysis?
Just how high should R2 be in regression analysis? I hear this question asked quite frequently. Previously, I showed how to interpret R-squared (R2). I also showed how it can be a misleading statistic...
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A Statistical Look at How Turnovers Impacted the NFL Season
“Turnovers are like ex-wives. The more you have, the more they cost you.”– Dave Widell, former Dallas Cowboys lineman It doesn’t take witty insight from a former NFL player to realize how big an impact...
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Creating a Shatterproof Process: Students Use Six Sigma to Improve Window...
I had the opportunity to speak with a great group of students from the New Jersey Governor’s School of Engineering and Technology—a summer program for high-achieving high school students. Students in...
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Analyzing “Luck” in College Basketball: Part 1
College basketball stat guru Ken Pomeroy uses advanced metrics to rank every NCAA Division I basketball team. Amongst the numerous statistics he tracks is one called "Luck." This statistic is...
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