post hoc power [🇷 for BE/BA]

posted by Helmut Homepage – Vienna, Austria, 2024-01-29 21:09 (173 d 13:52 ago) – Posting: # 23848
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Hi Imph,

❝ To calculate the power post hoc […], what are the observed parameters to use? observed CV, Point estimate (T/R), the real number of subject. Is that correct?

Yes it is. But please read this article for details why you should not do it.

Quoting the WHO*

The a posteriori power of the study does not need to be calculated. The power of interest is that calculated before the study is con­ducted to ensure that the adequate sample size has been selected. […] The relevant power is the power to show equivalence within the pre-defined acceptance range.
(my emphasis)

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