one-tailed test

one-tailed test
a hypothesis test (q.v.) in which the critical region is one tail of the distribution of the test statistic and the null hypothesis is tested against a one-sided alternative that includes deviations from the null hypothesis only in one direction, deviations in the other direction being of no consequence.

Medical dictionary. 2011.

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  • One-Tailed Test — A statistical test in which the critical area of a distribution is one sided so that it is either greater than or less than a certain value, but not both. If the sample that is being tested falls into the one sided critical area, the alternative… …   Investment dictionary

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  • Two-Tailed Test — A statistical test in which the critical area of a distribution is two sided and tests whether a sample is either greater than or less than a certain range of values. If the sample that is being tested falls into either of the critical areas, the …   Investment dictionary

  • one-tailed — ¦ ̷ ̷ ˌ ̷ ̷ adjective also one tail : being a statistical test for which the critical region consists of all values of the test statistic greater than a given value or less than a given value but not both compare two tailed herein * * * adj.… …   Useful english dictionary

  • one-tailed — also one tail adjective Date: 1947 being a statistical test for which the critical region consists of all values of the test statistic greater than a given value or less than a given value but not both compare two tailed …   New Collegiate Dictionary

  • one-tailed — adjective Statistics denoting a test for deviation from the null hypothesis in one direction only …   English new terms dictionary

  • Student's t-test — A t test is any statistical hypothesis test in which the test statistic follows a Student s t distribution if the null hypothesis is supported. It is most commonly applied when the test statistic would follow a normal distribution if the value of …   Wikipedia

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  • Welch's t test — In statistics, Welch s t test is an adaptation of Student s t test intended for use with two samples having possibly unequal variances. As such, it is an approximate solution to the Behrens–Fisher problem.FormulasWelch s t test defines the… …   Wikipedia

  • Binomial test — In statistics, the binomial test is an exact test of the statistical significance of deviations from a theoretically expected distribution of observations into two categories.For example, suppose we have a board game that depends on the roll of a …   Wikipedia

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