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4 Tutorials that teach One-Tailed and Two-Tailed Tests
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One-Tailed and Two-Tailed Tests

One-Tailed and Two-Tailed Tests

Author: Ryan Backman
Description:

This lesson will explain one-tailed and two-tailed tests.

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Tutorial
Terms to Know
Left-tailed test

A hypothesis test where the alternative hypothesis only states that the parameter is lower than the stated value from the null hypothesis.

One-tailed test

A hypothesis test where the alternative hypothesis only states that the parameter is higher (or lower) than the stated value from the null hypothesis.

Right-tailed test

A hypothesis test where the alternative hypothesis only states that the parameter is higher than the stated value from the null hypothesis.

Two-tailed test

A hypothesis test where the alternative hypothesis states that the parameter is different from the stated value from the null hypothesis; that is, the parameter's value is either higher or lower than the value from the null hypothesis.