Bioequivalence and Bioavailability Forum • Initial sample size guess for the Potvin methods

Initial sample size guess for the Potvin methods [Two-Stage / GS Designs]

posted by Helmut – Vienna, Austria, 2017-08-19 16:06 (1080 d 12:45 ago) – Posting: # 17710
Views: 24,725

Hi ElMaestro,

I tried GetStartNps.X3(GMR=0.95, CV=0.2, Pwr.T=0.8) and was honored with

Error in Power.calc(nps1, GMR, CV, Is.St2 = 1) : 

  could not find function "Power.calc"

Can you provide the function Power.calc(), please?

My standard code gives:

GMR : 0.95 target power : 0.8 ‘best guess’ CV : 0.2 Fixed sample size: 20 power : 0.835 ‘Type 1’ TSD, n1 : 16 (80.0% of N) ASN : 20.0 power (interim): 0.619 power (final) : 0.851

How does it compare to yours?

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Helmut Schütz

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Complete thread:

Initial sample size guess for the Potvin methods ElMaestro 2017-08-19 15:04
- Initial sample size guess for the Potvin methodsHelmut 2017-08-19 16:06
  - Initial sample size guess for the Potvin methods ElMaestro 2017-08-19 16:14
    - Initial sample size guess for the Potvin methods Helmut 2017-08-19 17:12
      - Initial sample size guess for the Potvin methods ElMaestro 2017-08-19 17:17
        
        Confuse-a-Cat Helmut 2017-08-19 17:33
        
        Confuse-a-Cat ElMaestro 2017-08-19 17:56
    - loop ↔ vectorized ↔ direct Helmut 2017-08-20 14:40
      - loop ↔ vectorized ↔ direct ElMaestro 2017-08-20 15:22
        
        loop ↔ vectorized ↔ direct Helmut 2017-08-20 16:23
        
        loop ↔ vectorized ↔ direct ElMaestro 2017-08-20 17:22
- The n ext crackpot iteration ElMaestro 2017-08-19 20:04
  - The n ext crackpot iteration Helmut 2017-08-20 02:20
- The ultimate crackpot iteration! ElMaestro 2017-08-20 14:35
  - The ultimate crackpot iteration! Helmut 2017-08-20 15:11
    - The ultimate crackpot iteration! ElMaestro 2017-08-20 15:28
      - The ultimate crackpot iteration! Helmut 2017-08-20 16:06
        
        The ultimate crackpot iteration! ElMaestro 2017-08-20 16:15
        
        The ultimate crackpot iteration! Helmut 2017-08-20 18:58
        
        The ultimate crackpot iteration! ElMaestro 2017-08-20 19:32
        
        Suggested code ElMaestro 2017-08-21 18:13
        
        Nitpicker! Helmut 2017-08-22 13:33
        
        Nitpicker! ElMaestro 2017-08-22 17:27
        
        Nitpicker! Helmut 2017-08-22 17:49
        
        Nitpicker! ElMaestro 2017-08-22 17:59
        
        Nitpicker! Helmut 2017-08-22 19:15
        
        Benchmark code ElMaestro 2017-08-22 22:29
        
        Benchmark code Helmut 2017-08-23 01:48