| ID | Affiliation | Location | Education | Confidence |
| 1 | 1 | 3 | 0 | 72 |
| 2 | 1 | 3 | 5 | 65 |
| 3 | 0 | 4 | 5 | 66 |
| 4 | 0 | 1 | 4 | 78 |
| 5 | 0 | 3 | 1 | 81 |
| 6 | 1 | 2 | 5 | 81 |
| 7 | 1 | 1 | 2 | 83 |
| 8 | 1 | 3 | 3 | 74 |
| 9 | 0 | 4 | 0 | 78 |
| 10 | 0 | 2 | 2 | 85 |
| 11 | 0 | 1 | 1 | 85 |
| 12 | 1 | 3 | 5 | 69 |
| 13 | 1 | 2 | 0 | 69 |
| 14 | 1 | 3 | 2 | 79 |
| 15 | 1 | 4 | 1 | 82 |
| 16 | 1 | 1 | 5 | 74 |
| 17 | 0 | 3 | 0 | 85 |
| 18 | 0 | 4 | 0 | 68 |
In the previous item, we used the Mann-Whitney test rather thanan independent t-test. Why might we Mann-Whitney rather than thet-test?
Original question- A sample of nurses with affiliation toprivate hospitals (affiliation = 0) and to university hospitals(affiliation = 1) was asked to rate their confidence in making theright decisions based on their level of ongoing inserviceprofessional development. Use a Mann-Whitney U-test to determine ifthe distribution of confidence in each group is the same. Be sureto always write the null and alternate hypotheses, so that thedecision is made in the correct direction. Also, conduct all astwo-tailed tests at α = 0.05.
