Bioequivalence and Bioavailability Forum • Power of TOST (R package MBESS)

Power of TOST (R package MBESS) [🇷 for BE/BA]

posted by d_labes – Berlin, Germany, 2009-10-07 10:46 (6096 d 01:40 ago) – Posting: # 4310
Views: 45,704

Dear Helmut!

❝ Quick tests

Oh actually quick! But dirty :-P

.
I assume that your 5th parameter is meant as CV.
But the function requires sigma, I think.

With that modification

library(MBESS)

CV <- 0.65

sigma<-sqrt(log(1+(CV)**2))



n <- 6

power.equivalence.md(0.05,TRUE, 0.8, 1.25, 0.95, sigma, n, n-2)

[1] 0.001620383



n <- 38

power.equivalence.md(0.05,TRUE, 0.8, 1.25, 0.95, sigma, n, n-2)

[1] 0.04509401

The answer for n=38 seems to me very sasophylistic home-brewed magic and Q-functionalistic :-D

.
Not so astonishing if you look at the author of that pice of R-software.

PS: I have just seen that the documentation suggest that CV can be used in case of log. But this seems erroneous.

—
Regards,

Detlew

Complete thread:

non-central t, power, R: ElMaestro 2009-10-03 19:05 [🇷 for BE/BA]
- non-central t, power, R: Helmut 2009-10-03 21:45
  - non-central t, power, R: ElMaestro 2009-10-04 21:51
    - non-central t, power, R: Helmut 2009-10-04 23:58
- non-central t is not the question d_labes 2009-10-05 12:58
  - SAS -> R -> SAS Helmut 2009-10-05 14:53
    - Lost in translation d_labes 2009-10-06 14:31
      - Lost in translation Helmut 2009-10-06 14:42
        
        Macacus cynocephalus d_labes 2009-10-06 15:14
        
        Lost in translation Helmut 2009-10-06 21:46
  - non-central t is not the question ElMaestro 2009-10-05 17:32
    - Power of TOST in R d_labes 2009-10-06 16:45
      - Power of TOST (R package MBESS) Helmut 2009-10-07 02:18
        
        Power of TOST (R package MBESS)d_labes 2009-10-07 08:46
        
        Power of TOST (R package MBESS) Helmut 2009-10-07 12:38
      - The Power at limits d_labes 2009-10-07 11:32
        
        Power at limits 2 d_labes 2009-10-07 15:15
        
        package MBESS Helmut 2009-10-07 22:36
        
        Package MBESS and Power curiosity d_labes 2009-10-15 14:57
        
        Package MBESS and Power curiosity ElMaestro 2009-10-17 12:26
        
        Apfelstrudel and EFG 2.01 Helmut 2009-10-17 13:44
        EFG and another power curiosity d_labes 2009-10-20 11:35
        
        EFG and another power curiosity ElMaestro 2009-11-23 19:03
        
        EFG and another power curiosity Helmut 2009-11-23 19:17
- non-central t, power, R: yjlee168 2009-10-07 00:08
  - PASS Helmut 2009-10-07 01:16
    - PASS yjlee168 2009-10-12 23:17
- R code for power ElMaestro 2009-10-09 11:32
  - Belgian beer ? Ohlbe 2009-10-09 11:50
  - Another one - R code for power of TROST d_labes 2009-10-09 13:50