Paired Samples T-Test Calculator

Compare means of paired observations (before-after, matched pairs)

Before / Pre-test Scores (comma-separated):

After / Post-test Scores (comma-separated):

Alternative Hypothesis:

The paired t-test compares means from the same group at two different times or under two conditions.

Formula: t = d̄ / (sd / √n)

Uses: Before-after studies, matched-pair designs, repeated measures.