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How Residuals Can Save You Thousands of Dollars on Your Next Car Purchase
Purchasing a used car can be stressful due to all the factors that need to be considered. Web sites such as www.cars.com provide you a wealth of information, but how do you navigate through it all to...
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Spicy Statistics and Attribute Agreement Analysis
My husband, Sean, and I were recently at my parent’s house for a picnic dinner. As a lover of hot sauce (I’m talking extremely hot, hot, hot, HOT sauce!), my stepdad always has a plethora of bottles...
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How Many Licks to the Tootsie Roll Center of a Tootsie Pop? Part 2
by Cory Heid, guest blogger A few months ago I posted a blog about Tootsie Pops and how many licks it takes to get to the Tootsie Roll center. If you haven’t read the post, here's a quick summary.Recap...
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Fantasy Studs and Regression to the Mean
Kevin Rudy has recently written two great posts (here and here) about how fantasy football studs perform the following year. For any fantasy team manager, the results demonstrate how difficult it can...
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Doing Gage R&R at the Microscopic Level
by Dan Wolfe, guest blogger How would you measure a hole that was allowed to vary one tenth the size of a human hair? What if the warmth from holding the part in your hand could take the measurement...
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Using Multi-Vari Charts to Analyze Families of Variations
When trying to solve complex problems, you should first list all the suspected variables identify the few critical factors and separate them from the trivial many, which are not essential to...
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Finding Value in Your Fantasy Football Draft
When it comes to fantasy football, there is a common statistical term that comes up again and again. It’s "variation." From season to season, week to week, and even quarter to quarter, NFL players can...
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Hotshot Stats: Evaluating the Service Life of Smokejumper Parachutes
It’s wildfire season out West. Time to be in awe of the destructive power of Nature. According to active fire maps by the USDA Forest Service, over 300 fires are now burning across a total of 1.5...
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Using Minitab Statistical Software to Analyze the Woeful Bengals
by Jeff Parks, guest blogger Being a Cincinnati Bengals fan is tough. It's true that Bengals fans don't have it as bad as, say, long-suffering Chicago Cubs fans...nevertheless, the Bengals haven’t won...
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Analyzing Baseball Park Factors: Home of the San Francisco Giants
Because I didn't trust the numbers on the ESPN web site, I calculated my own park factors using their formula. There’re a lot of interesting ways to look at the numbers, but one of the first things I...
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Curve Fitting with Linear and Nonlinear Regression
We often think of a relationship between two variables as a straight line. That is, if you increase the predictor by 1 unit, the response always increases by X units. However, not all data have a...
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Creating a Chart to Compare Month-to-Month Change
One member of Minitab's LinkedIn group recently asked this question:I am trying to create a chart that can monitor change by month. I have 2012 data and want to compare it to 2013 data...what chart...
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Creating Charts to Compare Month-to-Month Change, part 2
A member of Minitab's LinkedIn group recently asked how to create a chart to monitor change by month, specifically comparing last year's data to this year's data. My last post showed how to do this...
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A correspondence table for non parametric and parametric tests
Most of the data that one can collect and analyze follow a normal distribution (the famous bell-shaped curve). In fact, the formulae and calculationsused in many analyses simply take it for granted...
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Variation Amplification: Even a 3-Year-Old Understands It...Do You?
This weekend my 3-year-old son and I were playing with his marble run set, and he said to me, "The marbles start together, but they don't finish together!" It dawned on me that the phenomenon he was...
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Analyzing a Process Before and After Improvement: Historical Control Charts...
We tend to think of control charts only for monitoring the stability of processes, but they can be helpful for analyzing a process before and after an improvement as well. Not only do control charts...
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How much do different scoring systems affect fantasy football rankings?
Ever start a fantasy football draft and realize that passing touchdowns are worth 6 points, not 4? Or how about realizing at the last minute that the commissioner of your league decided to have a point...
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Quartile Analysis for Process Improvement
The value of analyzing data is well established in industries like manufacturing and mining, but data-driven process and quality improvement is increasingly being adopted in service industries like...
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Analyzing Baseball Park Factors: Don't Settle for Easy Answers
In an earlier post, I used AT&T Park to illustrate that a single number is rarely a good way to summarize data. Even the mean and median have their limitations. The time series plot shows how the...
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Using Hypothesis Tests to Bust Myths about the Battle of the Sexes
In my home, we’re huge fans of Mythbusters, the show on Discovery Channel. This fun show mixes science and experiments to prove or disprove various myths, urban legends, and popular beliefs. It’s a...
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