aproximate n [Power / Sample Size]

posted by d_labes  – Berlin, Germany, 2021-10-24 21:26 (861 d 05:20 ago) – Posting: # 22656
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Dear Imph,

beside to all what Helmut has told you you may find in the /doc directory of the package a PDF file "BE_power_sample_size_excerpt.pdf" which has some small further informations about the sample size estimation.

You may obtain an approximation of n by using the large sample approximation.
See P. Zhang
“A simple formula for sample size calculation in equivalence studies.”
J. Biopharm. Stat. 2003 Aug;13(3):529-38
This approximate number is in many cases relatively close to the exact value, and is used in PowerTOST as starting value of the iterative search of the sample size.



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