Don’t use the formula by Chow, Shao, Wang! [Power / Sample Size]

posted by daryazyatina – Ukraine, 2017-08-03 17:52 (2243 d 11:02 ago) – Posting: # 17654
Views: 18,231

Hi, Helmut

❝ Stop using the formula given by Chow, Shao, Wang! Sample sizes are way too small – which compromises power. If you used it in the past for 80% power – if all assumptions (CV, θ0) turned out to be “correct” – substantially more than 20% of studies should have failed. If not, you were lucky!

Thank you for such a comprehensive answer.
It's good that now we will know about this.

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