Design and Analysis of Experiments 2015 conference

A long, long time ago, I was a new statistics PhD student attending my first conference. To say I was intimidated is putting it mildly: Top researchers in experimental design and analysis from around the globe were scheduled to be at this conference. How would I be able to talk […]

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Why design of experiments keeps the science in science

In a recent discussion in the LinkedIn DOE group, I learned that some scientists resist the use of design of experiments because they believe that using DOE would be "taking the science out of science.” I believe this type of resistance comes from the minds of those who fear change. […]

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The eggciting results of my designed eggsperiment

In my previous blog entry, I talked about my frustrations in making good-looking hard-boiled eggs that were easy to peel. My Internet searches found a number of different techniques that cooks said were essential to success, but I wanted to know which techniques were best. So I set up a […]

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An eggciting designed eggsperiment

A typical scene in my kitchen: I make a batch of hard-boiled eggs with the hope of an easy peel and a beautifully cooked center. But when I sit down to enjoy my egg, I find that, sadly, it’s not so easy to peel – or I have discoloration around the […]

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Teaching with JMP, part 2

After writing the post on Teaching statistics with JMP last month, I didn’t think about a follow-on post since we had so many wonderful comments. But when we heard from Roger Hoerl at Union College about the thesis his student, Keilah Creedon, wrote (using JMP for the designed experiment part), […]

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Mmm cookies: a tale of discrete numeric variables, disallowed combinations and alias optimality

When I was in graduate school, one of my hobbies was to bake cookies for the department. For one of the basic chocolate chip cookie recipes, it wasn’t uncommon to switch the chocolate chips with another ingredient that was on sale that week (I was a grad student, after all). […]

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Alias Optimal versus D-optimal designs

In my previous blog entry, I discussed the purpose of the Alias Matrix in quantifying the potential bias in estimated effects due to the alias terms. In this blog post, we look at an example that creates a D-optimal design and an Alias Optimal design with the same number of […]

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What is an Alias Matrix?

When I create a design, the first place I typically look to evaluate the design is the Color Map On Correlations. Hopefully, I see a lot of blue, implying orthogonality between different terms. The Color Map On Correlations contains both the model terms and alias terms. If you have taken […]

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Here's help with screening experiments

As we head into February, your 2014 goals are likely already made, and the work on meeting those goals has begun in earnest. For many scientists and experimenters, that means designing the first set of experiments for projects. Many times, those experiments will be screening experiments, experiments designed to identify […]

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Creating a space-filling design for a map shape

One of my favorite new features in JMP 11 design of experiments is the Fast Flexible Filling (FFF) design in the Space Filling Design platform. When the JMP 11 Previews were released, Brad Jones showed an example of using FFF designs to place air quality monitors over the state of […]

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