This function allows the calculation of the correct degrees of freedom based on the specified design structure. While Satterthwaite may seem to you to be flawed or outdated, if the FDA want that for bioequivalence then that's what you give them. The available techniques for doing so, however, 'trick' the algorithm the packages uses for calculating denominator degrees of freedom, (almost always) leading to inflated p-values. Having said that, if you're doing pharms work, then follow the path required by the FDA. There are also other possible places you'll find by searching on "STAT" and "LIST" or "Discussion". I know that University of Georgia runs a series of discussion list servers where you can read (listen) to the opinions of many statistically dexterous minds and I think that is where I'd go if I wanted an opinion based on statistical theory, and not on utility of a given software package.Ī search for "stat-l" and "uga" will find you the address for the Georgia discussion list server. Faced with a similar dilemna, I would be looking for a stats discussion group. I think that is where your question belongs. There are some exceptions, especially in the Stat area, but the selection of method and interpretation of results really belongs in a general statistical discussion group. The alpha level (common choices are 0.01, 0.05, and 0. To use the F distribution table, you only need three values: The numerator degrees of freedom. I see it as an extension of the software manual that tells you how to use the software, not why a given model is selected. The F-distribution table is a table that shows the critical values of the F distribution. The SAS forums should concentrate on the use of SAS to produce an outcome, and the areas in which the SAS procedure is not delivering the required result. I'm not convinced that this belongs in this discussion group.
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