Double Double Day

Last year at this time, I wrote in celebration of a unique double: SAS' record revenues – the 34th straight year of growth, and in a recession, too – and being rated the No. 1 best workplace in the US. Would it be such a surprise if SAS repeated on […]

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The Double Play

Today SAS Institute had a huge double play of publicity. On the same day, we (1) learned that SAS was rated the No. 1 best place to work in the 2010 Fortune study and (2) announced that SAS achieved record revenues in 2009, despite the recession -- making it 34 […]

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JMP Is 20 Years Old

Today is the 20th anniversary of JMP's first release, and I want to thank everyone who has helped to make JMP a success. JMP Version 1 shipped on October 5, 1989 -- or as we claimed at the time September 35 -- so that we could say we shipped in […]

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Was Goldilocks’ Negative R-Square Sickness Contrived?

In my previous blog post about Goldilocks and the negative R-Square, I think I left you with an impression that regression fits are garbage unless you trim down your models. Basically, your attitude should be that of a sculptor: You cut away at the model until you have the best […]

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Goldilocks and the Negative R-Square

Learning from data is good, so you would think that bigger studies to fit bigger models is always good. How could it ever be worse to learn more through data? It’s time for a story. Goldilocks found the home of the research bears and looked into the first lab and […]

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What Is the Error if the Probability of Rain Is .5 and It Rains?

Suppose that a mortgage aggregator came to you and said that this triple-A assemblage of loans had one chance in a billion of losing money. Then you evaluated the package and found out that it really had a one-in-a-million probability of failing. The error in the probability estimate was just […]

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Optimal Design of the Choice Experiment

My previous blog post covered issues in the design of a choice experiment for laptop computers. The goal was to model the trade-offs among features and price. In this post, I'll show how to design a choice experiment. The Choice Design feature, which you access from the DOE menu in […]

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Choice Experimental Designs Are Different

Laptop vendors need to know which features are valued in a laptop and how much customers are willing to pay for them. Manufacturers could learn this through a market research technique know as a choice experiment. This post covers the elements of experimental design for choice experiments using JMP 8. […]

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