PowerTOST: Total sample size [Power / Sample Size]

posted by Helmut Homepage – Vienna, Austria, 2022-05-18 08:55 (50 d 10:38 ago) – Posting: # 23000
Views: 436

Hi Sereng,

» […] I believe you are stating n=750 per group in this parallel group study (total n=1500) using the assumptions from the completed study? Correct?

Nope. Pasted from my previous post:

Sample size (total)
 n     power
750   0.800246

The sample size functions of PowerTOST give always the total sample. If you are interested in the background, see this article.

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