Posts Tagged ‘ comparisons ’

"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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Example 8.6: Changing the reference category for categorical variables

September 21, 2010
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How can we change the reference category for a categorical variable? This question comes up often in a consulting practice.When including categorical covariates in regression models, there is a question of how to incorporate the categories. One simpl...
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