two-tailed

British  

adjective

1. 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

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Example Sentences

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

From Textbooks • Mar. 27, 2020

Finally, there is no presumption as to which format might lead to higher grades so the hypothesis is stated as a two-tailed test.

From Textbooks • Nov. 29, 2017

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

From Textbooks • Nov. 29, 2017

This is a one-tailed test and all of the alpha probability is placed in just one tail and not split into α/2 as in the above case of a two-tailed test.

From Textbooks • Nov. 29, 2017

It shelters not the hibiscus anthropoid, it gives not lodging to the two-tailed newt.

From No Man's Land by McNeile, H. C. (Herman Cyril)