For Exercises 3–5, assume that the ANOVA assumptions are met and perform the appropriate analysis of variance using .
Question 12.143
medicaltreatmt
3. Differences in Medical Treatments. A psychologist is interested in investigating whether differences in mean client improvement exist for three medical treatments. Seven clients undergoing each medical treatment were asked to rate their level of satisfaction on a scale of 0 to 100. The data are provided in the following table.
| Medical treatment 1 |
Medical treatment 2 |
Medical treatment 3 |
|---|---|---|
| 75 | 75 | 100 |
| 100 | 100 | 100 |
| 0 | 25 | 50 |
| 50 | 75 | 90 |
| 50 | 50 | 75 |
| 40 | 75 | 75 |
| 25 | 60 | 90 |
12.99.3
: Not all the population means are equal. population mean level of satisfaction for Medical Treatment 1. population mean level of satisfaction for Medical Treatment 2. population mean level of satisfaction for Medical Treatment 3. . Reject if . . Since is not we do not reject . There is insufficient evidence that not all of the population means are equal.
