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.

Group	Usefulness	Difficulty	Importance		Group	Usefulness	Difficulty	Importance
1	20	5	18		2	29	10	5
1	25	9	8		2	26	11	1
1	23	15	20		2	22	5	2
1	16	9	22		2	15	15	14
1	20	6	22		2	29	6	4
1	28	14	8		2	15	6	3
1	20	6	13		3	22	8	12
1	25	8	13		3	27	9	14
1	24	10	24		3	21	10	7
1	18	10	20		3	17	9	1
1	17	9	4		3	16	7	12
2	28	7	14		3	19	9	7
2	25	14	5		3	23	10	1
2	26	9	20		3	27	9	5
2	19	15	22		3	23	9	6
2	29	14	12		3	16	14	22
2	15	6	2

Questions

1. Analyze the data and interpret the results using a MANOVA.
2. Run a t-test using this data and interpret those results.
3. Compare the outcomes of the MANOVA and t-test and identify any differences. Which approach would you use? Why?