Curry spice turmeric boosts memory by nearly 30%, eases depression, study finds

Re:Curry spice turmeric boosts memory by nearly 30%, eases d... by sideshowb on Thursday January 25, 2018 @05:54AM (#16230075)

Am I right in thinking that statistical power is the true positive rate, so a test that always rejected the null hypothesis (whether correctly or incorrectly) would have the highest possible statistical power?

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Re:Curry spice turmeric boosts memory by nearly 30%, eases d... by closed on Thursday January 25, 2018 @07:58AM (#16230483)

No, statistical power as a concept is independent of the observed result of a test.

It is widely misunderstood though, so often people try to use an observed result to justify low power.

http://andrewgelman.com/2017/08/17/just-google-despite-limit...

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Re:Curry spice turmeric boosts memory by nearly 30%, eases d... by sideshowb on Friday January 26, 2018 @10:11AM (#16239696)

Is the wikipedia page on statistical power plain wrong then?

"The power of a binary hypothesis test is the probability that the test correctly rejects the null hypothesis (H0) when a specific alternative hypothesis (H1) is true. The statistical power ranges from 0 to 1, and as statistical power increases, the probability of making a type 2 error decreases. For a type 2 error probability of β, the corresponding statistical power is 1-β. "

So according to that, if I always reject H0 whether rightly or wrongly, that means β=0 and power=1.

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