Mary specializes in pain management. In an effort to better understand the effectiveness of competing strategies for reducing pain, she devises an experiment in which three groups, each comprised of randomly assigned participants who suffer from chronic lower back pain. Group 1 received Placebo, Group 2 received Cortisone injections, and Group 3 was guided through a Meditation exercise. After these treatments, Mary collected self-reported back pain scores from each participant. Low scores range from 0 (no pain) to 10 (unspeakable pain). Conduct an ANOVA, compile a summary table as shown below. Also calculate f, and all HDS VALUES AND ITS EFFECT SIZE D. Write up an interpretation beginning with reject or fail to reject null... per the text and help Mary determine whether the differences between the mean pain scores for each treatment group are statistically significant at an alpha level of .05.

placebo cortisone meditation

7	1	4
6	2	4
5	4	4
3	2	3
6	3	3
8	5	6
7	2	6
sum = 42	sum = 19	sum = 30

X²= 268 63 138

1. What is the independent and dependent variables? Please label which is which.

2. complete the anova summary table

3. calculate f

4. conduct 3 hds and ds (be sure to label the which two you are comparing)

5. Interpretation... (4.5 points) starting with "reject or fail to reject..." tip: F, f, hds and d should be included in your interpretations. Don't forget the p values)