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RegisterValidated frameworks; observed GMR not relevant [Two-Stage / GS Designs]
Hi Helmut
Trying to learn technical issues of TSD.
In the example you gave:
why the use of theta0 as 1.25 and not as GMR value? I understand the use of GMR of 0.95 for Potvin B method (as it was validated with this assumption), but don´t understant the meaning of theta0.
According to Power2Stage manual, theta 0 corresponds to the True ratio of T/R for simulating. (Defaults to the GMR argument if missing).
What is the meaning of "True ratio of T/R for simulating" and what is the difference for GMR?
Trying to learn technical issues of TSD.
In the example you gave:
library(Power2Stage)
power.2stage(CV=0.2, n1=12, alpha=c(0.0294, 0.0294), theta0=1.25,
targetpower=0.8, pmethod="shifted", nsims=1e6)$pBE
# [1] 0.046352 # n1 within validated range: TIE <0.05.why the use of theta0 as 1.25 and not as GMR value? I understand the use of GMR of 0.95 for Potvin B method (as it was validated with this assumption), but don´t understant the meaning of theta0.
According to Power2Stage manual, theta 0 corresponds to the True ratio of T/R for simulating. (Defaults to the GMR argument if missing).
What is the meaning of "True ratio of T/R for simulating" and what is the difference for GMR?
Complete thread:
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 06:40 [Two-Stage / GS Designs]
![[Mix]](https://static.bebac.at/img/mix.png "open in Mix view")
- Data for 2nd stage of Potvin’s designs ElMaestro 2017-02-18 10:20
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 13:29
- GMR = fixed! Helmut 2017-02-18 16:23
- Data for 2nd stage of Potvin’s designs BE-proff 2017-02-18 13:29
- “Type 1” slightly higher power than “Type 2” for the same adj. α Helmut 2017-02-18 11:51
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-18 13:31
- Terminology Helmut 2017-02-18 16:27
- Terminology Yura 2017-02-20 11:28
- Which GMR to plug in ElMaestro 2017-02-20 11:46
- Which GMR to plug in BE-proff 2017-02-21 11:35
- Which GMR to plug in ElMaestro 2017-02-21 11:47
- Which GMR to plug in BE-proff 2017-02-21 11:35
- Validated frameworks; observed GMR not relevant Helmut 2017-02-22 12:03
- Validated frameworks; observed GMR not relevantSilva 2017-03-09 01:26
- GMR, theta 0 and that all d_labes 2017-03-09 09:21
- GMR, theta 0 and that all Silva 2017-03-09 12:38
- GMR, theta 0 and that all ElMaestro 2017-03-09 12:56
- GMR, theta0 and that all d_labes 2017-03-09 13:55
- GMR, theta0 and that all Silva 2017-03-09 18:01
- GMR, theta 0 and that all Silva 2017-03-09 12:38
- GMR, theta 0 and that all d_labes 2017-03-09 09:21
- Validated frameworks; observed GMR not relevantSilva 2017-03-09 01:26
- Which GMR to plug in ElMaestro 2017-02-20 11:46
- Terminology Yura 2017-02-20 11:28
- Terminology Helmut 2017-02-18 16:27
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-21 11:31
- “Type 1” slightly higher power than “Type 2” for the same adj. α BE-proff 2017-02-18 13:31
- Data for 2nd stage of Potvin’s designs ElMaestro 2017-02-18 10:20
Ing. Helmut Schütz