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Paired T Test

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Paired T Test - definition(s)

Paired T Test - The two-sample t-test is used to determine if two population means are equal.

The data may either be paired or not paired.

For paired t test, the data is dependent, i.e. there is a one-to-one correspondence between the values in the two samples.

For example, same subject measured before & after a process change, or same subject measured at different times.

For unpaired t test, the sample sizes for the two samples may or may not be equal.

[Category=Data Quality ]

Source: iSixSigma, 10 February 2011 09:52:47, External 

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