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mmmorrison
‎02-25-2016
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Re: Approximate Degrees of Freedom test for ANCOVA

by Calcite | Level 5 in Statistical Procedures
‎12-02-2015 08:51 PM
‎12-02-2015 08:51 PM
Thank you for your response. I will look into the resouces you suggested.   Can the Kenward-Roger (KR) degree of freedom adjustment handle violations to normality? With the ADF solutions I mentioned for ANOVA, trimmed means/bootstrapping can be added to the syntax to handle issues of non-normality.   Warm regards ... View more

Approximate Degrees of Freedom test for ANCOVA

by Calcite | Level 5 in Statistical Procedures
‎12-01-2015 05:55 PM
‎12-01-2015 05:55 PM
Hello SAS Community   I was curious as to whether any of the members knew of an approximate degrees of freedom test for ANCOVA in SAS. Lix and Keselman (1995) and Keslman, Wilcox, and Lix (2003) discuss the ADF solution for ANOVA designs and even the use of bootstrapping with the solution. However, I have been unable to find any applications of an ADF solution used with ANCOVA analyses.   Thank you for your time. Any assistance would be appreciated.   Warm regards  ... View more
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