Paired T Test

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January 15, 2008 at 12:24 pm #49105

chhabra
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hi,
Is the paired t test always a two-tail test?
Regards,
amit

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January 15, 2008 at 12:57 pm #167216

Amit Jha
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Paired T test is sensitive to change in any direction Pre and Post the given condition. So by this it is a two tailed test.
However Paired t test is used when you have 1 measurement variable that has two attribute out comes. So you are comparing two sets of data points. E.G- time to reach a destination when driving without drinnking and when driving after drinking.

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January 15, 2008 at 1:07 pm #167217

Ryan
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Paired t tests can be either two-tailed (nondirectional) or one-tailed (directional). Directional tests should be based on theory and/or previous research supporting this viewpoint.

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