The equation for the paired-samples t test is the same as that for the single-samples t test except that the data are now difference scores.

Question

Quizplus · Accepted Answer

The equation for the paired-samples t test is t = (Mdiff - 0) / (SDdiff / sqrt(n)), where Mdiff is the mean difference score, SDdiff is the standard deviation of the difference scores, and n is the number of pairs. This is the same as the equation for the single-samples t test, except it uses difference scores rather than raw scores.

The Equation for the Paired-Samples T Test Is the Same