Tingle's Technology Notes

I am the Technical Lead for CDL Digital Special Collections, these are some notes of mine, views expressed are my own or the original author's and do not represent my employer. http://btingle.bitbucket.org/
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the significance calculation makes a critical assumption that you have probably violated without even realizing it: that the sample size was fixed in advance. If instead of deciding ahead of time, “this experiment will collect exactly 1,000 observations,” you say, “we’ll run it until we see a significant difference,” all the reported significance levels become meaningless.
  1. tingletech posted this