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critical region

American  
[krit-i-kuhl ree-juhn] / ˈkrɪt ɪ kəl ˈri dʒən /

noun

Statistics.

  1. the rejection region for the null hypothesis in the testing of a hypothesis.

    The appropriate selection of a critical region is a fundamental problem in the development of permutation tests.
critical region British  

noun

  1. that part of a statistical distribution in which the probability of a given hypothesis is less than the chosen significance level, so that the hypothesis would be rejected

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of critical region

First recorded in 1950–55

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.