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Remember: p-values Are Not Effect Sizes

Authors: John Mount and Nina Zumel.

The p-value is a valid frequentist statistical concept that is much abused and mis-used in practice. In this article I would like to call out a few features of p-values that can cause problems in evaluating summaries.

Keep in mind: p-values are useful and routinely taught correctly in statistics, but very often mis-remembered or abused in practice.

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From Hamilton’s Lectures on metaphysics and logic (1871).
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Posted on Categories Rants, Statistics, TutorialsTags , , , 3 Comments on The unfortunate one-sided logic of empirical hypothesis testing

The unfortunate one-sided logic of empirical hypothesis testing

I’ve been thinking a bit on statistical tests, their absence, abuse, and limits. I think much of the current “scientific replication crisis” stems from the fallacy that “failing to fail” is the same as success (in addition to the forces of bad luck, limited research budgets, statistical naiveté, sloppiness, pride, greed and other human qualities found even in researchers). Please read on for my current thinking. Continue reading The unfortunate one-sided logic of empirical hypothesis testing