Psy-Kosh comments on Case study: abuse of frequentist statistics - Less Wrong
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Okay, I think that makes sense. Let me put it into my own words:
The test is guaranteed to be not statistically significant merely by virtue of cutting up the outcome space into pieces, each of which has at least 5% chance of happening. And further, because the null hypothesis has been (arbitrarily) defined to be "the two methods are the same", statistical insignificance means a favorable result.
Does that about cover it? If so, that's pretty bad.
That's more or less my understanding of the situation.
And yes... that is indeed pretty bad. :)