if you test for the for the mean of the differences in a paired t-test, there are how many degrees of freedom?

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15-12-2022
Mathematics

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if you test for the for the mean of the differences in a paired t-test, there are how many degrees of freedom?

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smecloudbird18 smecloudbird18 · Answer 1 · 2022-12-20T17:08:56-05:00

There is zero or no degree of freedom in the mean of the differences in a paired t-test.

For the paired t-test, we need two variables. One variable defines the pairs for the observations. The second variable is a measurement. Sometimes, we already have the paired differences for the measurement variable. Other times, we have separate variables for “before” and “after” measurements for each pair and need to calculate the differences.

We also have an idea, or hypothesis, that the differences between pairs is zero. It is also known as the dependent samples t-test, the paired-difference t-test, the matched pairs t-test and the repeated-samples t-test.

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