A researcher investigated whether training with virtual reality (VR) simulation compared to traditional physical models affects the manual dexterity of veterinary students. Two groups of seven students were assessed, and each student received a dexterity score out of 50. Group 1 trained using the VR simulator, while Group 2 trained using physical models. The scores and their ranks are presented in the table below.
| Dexterity score (max. 50) | |||||
|---|---|---|---|---|---|
| VR simulator group | Physical model group | ||||
| Participant | Score | Rank | Participant | Score | Rank |
| A | 21 | 2 | H | 18 | 1 |
| B | 28 | 4 | I | 25 | 3 |
| C | 34 | 7 | J | 30 | 5 |
| D | 39 | 9 | K | 34 | 7 |
| E | 41 | 11 | L | 34 | 7 |
| F | 45 | 13 | M | 40 | 10 |
| G | 48 | 14 | N | 43 | 12 |
| n1=7n_1 = 7n1=7 | n2=7n_2 = 7n2=7 |
Before conducting a Mann-Whitney U test, the data from both groups must be pooled and ranked. In the results, three participants have the same score of 34. Explain how this is dealt with when ranking the data.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.