Two-tailed tests are _ conservative and powerful than one-tailed tests.

1 answer:

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Two-tailed tests are more conservative and less powerful than one-tailed tests.

In statistics, one-tailed and two-tailed tests test are used to determine the statistical significance of a variable on a sample of people. Two-tailed tests are more conservative than one-tailed tests because by using a two-tailed test, you are determining the possibility of a causality between variables in both directions, unlike a one-tailed test where you are determining the possibility of a causality between variables in one direction only.

Additionally, two-tailed tests are less powerful than one-tailed tests because a two -tailed test has its alpha value set at half the value of a one-tailed test (.10 for a two-tailed test and .05 for a one-tailed test).

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