What is the Paired T-Test Calculator?

The Paired T-Test Calculator is a statistical tool that helps students, researchers, and analysts determine whether the mean difference between paired observations is significantly different from zero. By entering the differences between each pair of observations, the calculator computes the mean difference, standard deviation of differences, and the paired t-score. This is useful for before-and-after studies, matched-subject experiments, or any scenario where measurements are taken in pairs, providing a fast and accurate way to assess statistical significance.

How to Use:

1. Enter Differences (d) Between Pairs: Input the differences between paired observations, separated by commas (e.g., 2, -1, 3, 4, -2).
2. Click “Calculate”: The tool computes the mean of differences, standard deviation, and the paired t-score using the formula t=dˉsd/nt = \frac{\bar{d}}{s_d / \sqrt{n}}t=sd​/n​dˉ​.
3. Review Result: The output displays the number of pairs, mean difference, standard deviation of differences, and the calculated paired t-score, with clear formatting for easy interpretation.