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Topic: kolmogov-smirnov, wilcoxon and kruskal tests
Replies: 14   Last Post: Dec 31, 2012 6:38 PM

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Ray Koopman

Posts: 3,383
Registered: 12/7/04
Re: kolmogov-smirnov, wilcoxon and kruskal tests
Posted: Dec 23, 2012 12:27 AM
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On Dec 22, 5:22 pm, czytaczg...@gmail.com wrote:
> [...]
>
> according to the KS test they come from the same distribution:


NO. You misunderstand the logic of hypothesis testing. Failing to
reject a hypothesis does not mean that it is true or that you should
act as if it were true. It means only that, in the way that the test
looks at data, your data are not inconsistent with the hypothesis.
Other tests, that look at the data differently, may well disagree.



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