From data to a defensible conclusion
One dataset, four stages, twelve questions. Expect about 15–20 minutes. Every answer has an explanation, and you can return to your saved progress.
The study
Eight hypothetical students took a test before and after a study workshop. Scores are points out of 100. Work through the data, the paired analysis, and what the result can establish.
Inspect the data
| Student | Before | After |
|---|---|---|
| 1 | 72 | 78 |
| 2 | 65 | 70 |
| 3 | 80 | 85 |
| 4 | 68 | 72 |
| 5 | 75 | 82 |
| 6 | 82 | 84 |
| 7 | 70 | 76 |
| 8 | 77 | 80 |
The study has no randomized comparison group. Keep that limitation in mind when interpreting the result.
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