An example of when one would want to use a one-tailed test is in the error rate of a factory. Let’s say a label manufacturer wants to make sure that errors on labels are below 1%. It would be too costly to have someone check every label, so the factory selects random samples of the labels and test whether errors exceed 1% with whatever level of significance they choose. This represents the implementation of a one-tailed test.
Investment dictionary. Academic. 2012.
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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 … Medical 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
Two-tailed test — The two tailed test is a statistical test used in inference, in which a given statistical hypothesis, H0 (the null hypothesis), will be rejected when the value of the test statistic is either sufficiently small or sufficiently large. This… … Wikipedia
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
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