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one-tailed

British

adjective

statistics (of a significance test) concerned with the hypothesis that an observed value of a sampling statistic either significantly exceeds or falls significantly below a given value, where the error is relevant only in one direction: for instance, in testing whether scales are fair a customer does not regard overweight goods as a relevant error Compare two-tailed

"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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The finding about reduced authoritarianism barely met the threshold of significance –– and with a one-tailed t-test.

From Scientific American • Nov. 5, 2020

A one-tailed test provides a lower standard for achieving significance compared to the much more common two-tailed test.

From Scientific American • Nov. 5, 2020

Is this a one-tailed test or two-tailed test?

From Textbooks • Nov. 29, 2017

Remember, if someone is making a claim it will always be a one-tailed test.

From Textbooks • Nov. 29, 2017

Clare seemed absorbed in his game with his four-footed, one-tailed friends, but he was wide awake: he had Abdiel to deliver, and kept, therefore, all the time, at least half an eye on Glum Gunn.

From A Rough Shaking by MacDonald, George

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