A researcher randomly assigns 33 subjects to one of three groups. Group 1 receives technical dietary information interactively from an online website. Group 2 receives the same information from a nurse practitioner, while Group 3 receives the information from a video made by the same nurse practitioner. The researcher looked at three different ratings of the presentation: difficulty, usefulness, and importance to determine if there is a difference in the modes of presentation. In particular, the researcher is interested in whether the interactive website is superior because that is the most cost-effective way of delivering the information. Difficulty Importance Group Usefulness Difficulty Importance Group Usefulness 5 1 20 UI 18 IN 29 10 11 H 25 9 8 26 N N 22 2 23 15 20 5 22 15 15 14 16 9 IN 20 6 22 2 29 6 4 28 8 6 3 14 IN 15 13 22 8 12 20 6 9 14 25 8 13 W 27 24 21 10 24 10 3 18 10 20 3 17 9 12 17 9 4 3 16 7 28 7 14 9 W 19 25 14 5 3 23 10 5 N 26 9 20 W 27 9 22 23 9 6 W 19 15 NN 16 29 3 14 22 14 12