Test priori power - Welch T test

[obh]

Yes of course In the morning every thing seems clear

 

[obh]

Okay, I checked with the nice person from R that wrote the function and it appears that he missed squared (for SD), so the manual calculation is correct. I can close this long thread
Thanks Dason and Greta for your help
This is the best statistics forum.

Hi, I forgot to update that the R function was fixed. I I tested it successfully. Thanks you Claus