Bioequivalence and Bioavailability Forum • Rounding or not to rounding

Rounding or not to rounding [🇷 for BE/BA]

posted by ElMaestro – Denmark, 2010-05-05 15:15 (5879 d 01:56 ago) – Posting: # 5298
Views: 30,068

Dear Yung-jin

❝ Are you saying that these output are not "Type III SS"? :confused:

Not at all what I tried to say. There is no line in the anova tables specifying a p-value for the type III sequence effect; the tables include just Subject, Period and Treatment. You can find a (which is not the same as the) P-value for seq by using drop1 on a model without Subject.
If you follow the true definition of type III SS there will be no reduction of SS by inclusion of Seq once Subj is in the model for a 2,2,2-BE study. This is the R way. You may see the SS reduction for this effect specified as something effectively zero such as 1.23456e-7 etc., reflecting just machine precision at the stopping criterion for the fitting Al Gore Rhythm.
On the other hand, one can convince oneself by the possible presence of a sequence effect manually using the approach shown in the book by Chow & Liu. SAS therefore -if I recall right- spits out a positive SS reduction, which can just be obtained by fiddling as described above (I think I posted how to do it in R some time ago, just cannot find it now). I am not implying the SAS way is better or more correct.
Bear is fine as it is.

Best regards
EM.

—
Pass or fail!
ElMaestro

Complete thread:

F value for sequence effect Pakawadee 2010-05-03 11:48
- F value for sequence effect AA 2010-05-03 13:38
- F value for sequence effect Ohlbe 2010-05-03 14:16
  - F value for sequence effect Pakawadee 2010-05-04 03:48
    - F value for sequence effect ElMaestro 2010-05-04 08:48
      - F value for sequence effect Pakawadee 2010-05-04 12:12
      - F value; rounding Helmut 2010-05-04 13:00
        
        log rounding machine d_labes 2010-05-04 13:35
        Rounding or not to rounding yjlee168 2010-05-04 21:27
        
        Rounding or not to rounding ElMaestro 2010-05-04 23:23
        
        Rounding or not to rounding yjlee168 2010-05-05 01:17
        
        Rounding or not to rounding ElMaestro 2010-05-05 12:15
        
        Rounding or not to rounding yjlee168 2010-05-05 12:59
        
        Rounding or not to roundingElMaestro 2010-05-05 13:15
        
        Rounding or not to rounding yjlee168 2010-05-05 13:28
        Type III SS sequence effect -revised yjlee168 2010-05-05 23:58
        
        Type III SS sequence effect -revised ElMaestro 2010-05-06 07:27
        
        SAS-like Type III SS sequence with bear? yjlee168 2010-06-03 13:04
        
        New dataset? d_labes 2010-05-05 11:40
        
        New dataset? yjlee168 2010-05-05 12:31
        
        log to 3 decimals guess work d_labes 2010-05-05 16:00
        
        log to 3 decimals guess work yjlee168 2010-05-05 20:13
        
        rounding and presentation of data Helmut 2010-05-05 20:29
        
        rounding and presentation of data yjlee168 2010-05-05 21:05
        
        rounding and presentation of data in R martin 2010-05-06 07:53
        
        Canadian logs d_labes 2010-05-06 10:12
        
        Canadian logs ElMaestro 2010-05-06 10:21
        Canadian logs Helmut 2010-05-06 14:57
        
        Canadian lost d_labes 2010-05-06 15:38