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Paired t test or Wilcoxon matched pairs test
The graph above shows the sample data for a paired t test. Note the following:
| • | Since the data are paired, the best way to show the data is via a before after graph, as shown on the left. A bar graph showing the average value before and the average value after really doesn't properly display the results from a paired experiment. |
| • | The graph uses arrows to show the sequence from Before to After. You may prefer to just show the lines with no arrowheads. Choose in the Format Graph dialog. |
| • | The P value is copy and pasted from the paired t test analysis. |
| • | The paired t test first computes the difference between pairs. The graph on the right shows these differences. These values were computed using the Remove Baseline analysis. |
| • | The confidence interval for the difference between means shown on the right graph was copy and pasted from the paired t test results. |
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