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*To*: asreml@chiswick.anprod.CSIRO.AU*Subject*: df with random effects*From*: Hugo Montaldo <hmontald@metz.une.edu.au>*Date*: Tue, 02 Jun 1998 11:34:03 +1000*Sender*: owner-asreml

Hello: In the example Ex11a, we have 3 lines and 9 sires,(actually the sires are nested in the lines). There is 65 observations and 74 animals in total. The addition of an animal effect or a sire effects does not change the degrees of freedom of the error (62), which are 65-2-1. The test for lines will be with 2, 62 df with any number of other random effects?. If we use Mixed of SAS with a sire model we got 56 df for the denominator for testing lines, which comes from deducting 2 df for lines, 9-3 = 6 df for sires/lines and 1 df for mu. All other things are identical. Could someone explain the difference in df's?. Thank you Hugo

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