A researcher randomly assigns 33 subjects to one of threegroups. Group 1 receives technical dietary informationinteractively from an on-line website. Group 2 receives the sameinformation from a nurse practitioner, while Group 3 receives theinformation from a video tape made by the same nursepractitioner.
The researcher looked at three different ratings of thepresentation; difficulty, usefulness, and importance to determineif there is a difference in the modes of presentation. Inparticular, the researcher is interested in whether the interactivewebsite is superior because that is the most cost-effective way ofdelivering the information.
1. Run the appropriate analysis of the data and interpret theresults.
2. How could this study have been done differently? Why or whynot would this approach be better?
Group | Usefulness | Difficulty | Importance |
1 | 20 | 5 | 18 |
1 | 25 | 9 | 8 |
1 | 23 | 15 | 20 |
1 | 16 | 9 | 22 |
1 | 20 | 6 | 22 |
1 | 28 | 14 | 8 |
1 | 20 | 6 | 13 |
1 | 25 | 8 | 13 |
1 | 24 | 10 | 24 |
1 | 18 | 10 | 20 |
1 | 17 | 9 | 4 |
2 | 28 | 7 | 14 |
2 | 25 | 14 | 5 |
2 | 26 | 9 | 20 |
2 | 19 | 15 | 22 |
2 | 29 | 14 | 12 |
2 | 15 | 6 | 2 |
2 | 29 | 10 | 5 |
2 | 26 | 11 | 1 |
2 | 22 | 5 | 2 |
2 | 15 | 15 | 14 |
2 | 29 | 6 | 4 |
2 | 15 | 6 | 3 |
3 | 22 | 8 | 12 |
3 | 27 | 9 | 14 |
3 | 21 | 10 | 7 |
3 | 17 | 9 | 1 |
3 | 16 | 7 | 12 |
3 | 19 | 9 | 7 |
3 | 23 | 10 | 1 |
3 | 27 | 9 | 5 |
3 | 23 | 9 | 6 |
3 | 16 | 14 | 22 |
