two-tailed

British

adjective

statistics (of a significance test) concerned with the hypothesis that an observed value of a sampling statistic differs significantly from a given value, where an error in either direction is relevant: for instance, in testing the fairness of scales, an inspector will seek to exclude both overweight and underweight goods Compare one-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

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A test of two variances may be left-tailed, right-tailed, or two-tailed.

From Textbooks • Mar. 27, 2020

If you are conducting a two-tailed hypothesis test with α = 0.01, what p-values will cause you to reject the null hypothesis?

From Textbooks • Mar. 27, 2020

This gives us the decision rule for testing a hypothesis for a two-tailed test:

From Textbooks • Nov. 29, 2017

Is this a left-tailed, right-tailed, or two-tailed test?

From Textbooks • Sep. 19, 2013

I repeated this experiment several times, and it always appeared to succeed; and all the two-tailed lizards were called mine.

From Olla Podrida by Marryat, Frederick

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