Posts Tagged ‘ statistical training ’

ESTIMATE Statements – the final installment

May 2, 2012
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FINALLY…the simplest ESTIMATE statements to write are for continuous variables not involved in interactions or higher order terms. Consider a data set containing the 2004 SAT scores for each of the 50 states. The file includes the combined math and v...
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"Easy button" for ESTIMATE statements

April 25, 2012
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My previous blog demonstrated the most difficult type of ESTIMATE statement to write—a two-way (or higher) ANOVA with interactions. An "easy button" for ESTIMATE statement comes by having a simpler model. Models with only main effects and no interact...
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The magical ESTIMATE (and CONTRAST) statements

April 23, 2012
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When asked to select the best (or worst) of something in a business setting, do you wish you had "magic glasses" to see the answer? PROC GLM and other statistical modeling procedures have their own versions of such an item with their ESTIMATE (and CONT...
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The Human Side of Statistical Process Control: Three Applications of SAS/QC You Might Not Have Thought About

March 22, 2011
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When you think of statistical process control, or SPC for short, what industry first comes to your mind? In the past 10 or 15 years, diverse industries have begun to standardize processes and administrative tasks with statistical process control. ...
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Who Ate My Lunch? Discriminant Thresholds to Reduce False Accusations

February 18, 2011
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Lunch. For some workers, it’s the sweetest part of an otherwise bitter day at the grindstone. Nothing can turn that sweetness sour like going into the breakroom to discover that someone has taken your lunch and eaten it themselves. Nothing lik...
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The Punchline: MANOVA or a Mixed Model?

February 2, 2011
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The Punchline: MANOVA or a Mixed Model?

So, if you were reading last week, we talked about how to structure your data for a mixed models repeated measures analysis. And as my friend Rick pointed out, there’s more than one way to go about restructuring your data (if you ask real nice, ...
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The Bayes theorem, explained to an above-average squirrel

January 31, 2011
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The Bayes theorem, explained to an above-average squirrel

Editor's Note: The following question was recently asked of our statistical training instructors. Terry Woodfield, along with Bob Lucas took the time to write this eloquent and easily digestible answer. Question: I'm trying to get a general
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Discrimanant Analysis, Priors, and Fairy-Selection

January 6, 2011
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Discrimanant Analysis, Priors, and Fairy-Selection

A student in my multivariate class last month asked a question about prior probability specifications in discriminant function analysis: What if I don't know what the probabilities are in my population? Is it best to just use the default in PROC D...
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