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Using Designed Experiments (DOE) to Minimize Moisture Loss
As a person who loves baking (and eating) cakes, I find it bothersome to go through all the effort of baking a cake when the end result is too dry for my taste. For that reason, I decided to use a...
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P-value Roulette: Making Hypothesis Testing a Winner’s Game
Welcome to the Hypothesis Test Casino! The featured game of the house is roulette. But this is no ordinary game of roulette. This is p-value roulette!Here’s how it works: We have two roulette wheels,...
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5 Simple Steps to Conduct Capability Analysis with Non-Normal Data
by Kevin Clay, guest bloggerIn transactional or service processes, we often deal with lead-time data, and usually that data does not follow the normal distribution.Consider a Lean Six Sigma project to...
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Gauging Gage Part 3: How to Sample Parts
In Parts 1 and 2 of Gauging Gage we looked at the numbers of parts, operators, and replicates used in a Gage R&R Study and how accurately we could estimate %Contribution based on the choice for...
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Making the World a Little Brighter with Monte Carlo Simulation
If you have a process that isn’t meeting specifications, using the Monte Carlo simulation and optimization tool in Companion by Minitab can help. Here’s how you, as a chemical technician for a paper...
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How Can a Similar P-Value Mean Different Things?
One highlight of writing for and editing the Minitab Blog is the opportunity to read your responses and answer your questions. Sometimes, to my chagrin, you point out that we've made a mistake....
View ArticleThe Null Hypothesis: Always “Busy Doing Nothing”
The 1949 film A Connecticut Yankee in King Arthur's Court includes the song “Busy Doing Nothing,” and this could be written about the Null Hypothesis as it is used in statistical analyses. The words to...
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Need to Validate Minitab per FDA Guidelines? Get Minitab's Validation Kit
Last week I was fielding questions on social media about Minitab 18, the latest version of our statistical software. Almost as soon as the new release was announced, we received a question that comes...
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Making Steel Even Stronger with Monte Carlo Simulation
If you have a process that isn’t meeting specifications, using Monte Carlo simulation and optimization can help. Companion by Minitab offers a powerful, easy-to-use tool for Monte Carlo simulation and...
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What Does It Mean When Your Probability Plot Has Clusters?
Have you ever had a probability plot that looks like this?The probability plot above is based on patient weight (in pounds) after surgery minus patient weight (again, in pounds) before surgery.The red...
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How Many Samples Do You Need to Be Confident Your Product Is Good?
How many samples do you need to be “95% confident that at least 95%—or even 99%—of your product is good?The answer depends on the type of response variable you are using, categorical or continuous. The...
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Sealing Up Patient Safety with Monte Carlo Simulation
If you have a process that isn’t meeting specifications, using the Monte Carlo simulation and optimization tools in Companion by Minitab can help. Here’s how you, as an engineer in the medical device...
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What's the Difference between Confidence, Prediction, and Tolerance Intervals?
In statistics, as in life, absolute certainty is rare. That's why statisticians often can't provide a result that is as specific as we might like; instead, they provide the results of an analysis as a...
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Controls Charts Are Good for So Much More than SPC!
Control charts take data about your process and plot it so you can distinguish between common-cause and special-cause variation. Knowing the difference is important because it permits you to address...
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Snowy Statistics: 2018 Winter Weather and Analyzing Boston's Record 2015...
As we start off 2018, our eyes are on the winter weather, specifically low temperatures and snowfall. After 2015-2016's warmest winter on record and Chicago breaking records in 2017 with no snow...
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