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directional test

directional test A directional test is a significance test that calculates probability for results as extreme as the observed one in only one specified direction, such as values larger than the null-hypothesized parameter.

A directional test is a significance test that calculates probability for results as extreme as the observed one in only one specified direction, such as values larger than the null-hypothesized parameter. It is the same as a one-tailed test or one-tailed probability.

Also see

Sources

Drafting source: Online Statistics Education, version 2 (David M. Lane, project leader). Version 2; publisher statement snapshot 2026-10-18; SHA-256 0dcad9ee85f61f9e2bb24d26279de155ac749164ea4da2a3bffeabcf9ea471a6. “One Tailed” (one_tailed.html).
public-domain-US · Definition uses new wording; original source retains its stated licence. · Source snapshot SHA-256: 2f6b0758e9c8d563ef45c937a7a1360bc5f0a5b929927525902aa8b72fdb1145

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PsychTerms (psychterms.org), CC BY 4.0, version 1. “directional test.” Development preview.

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