Dr. Evans is researching a new mindfulness mobile app to see how effective it is in reducing anxiety-related fidgeting behaviors in students preparing for final exams.
Dr. Evans used 10 students: 5 in the control group (no app) and 5 in the experimental group (app users). Dr. Evans predicted that students using the app would show fewer fidgeting behaviors than the control group.
Dr. Evans decided to perform a Mann-Whitney U test to find out whether the app had a significant effect on fidgeting behaviors. Table 5 shows the ranked results.
Complete Table 5 and calculate the Mann-Whitney U value for this data.
| Control Group (No App) | Experimental Group (App) | ||
|---|---|---|---|
| Number of fidgeting behaviors | Rank | Number of fidgeting behaviors | Rank |
| 12 | 10.0 | 6 | 3.0 |
| 10 | 8.0 | 8 | 5.5 |
| 8 | 5.5 | 5 | 2.0 |
| 9 | 7.0 | 7 | 4.0 |
| 11 | 9.0 | 4 | 1.0 |
| Total (R1R_1R1) | Total (R2R_2R2) |
638 exam-style questions on Edexcel A Level Psychology Methods. Each one has a worked solution and a mark scheme showing where the marks go.