Solution: A researcher conducted an experiment on the effects of a new "drug" on depression. The researcher had a control group that received nothing,
Question: A researcher conducted an experiment on the effects of a new "drug" on depression. The researcher had a control group that received nothing, a placebo group, and an experimental group that received the "drug." A depression inventory that provided a measure of depression on a 50 -point scale was used ( 50 indicates that an individual is very high on the depression variable). The ANOVA summary table appears next, along with the mean depression score for each condition.
| Source | df | SS | MS | F | p |
| Between | 1202.313 | ||||
| Within | 2188 | ||||
| Total | 3320.313 |
- Complete the ANOVA summary table.
- Is \(F_{obs}\) significant at \(\alpha=05\); at \(\alpha=.01 ?\)
- Perform post hoc comparisons if necessary.
- What conclusions can be drawn from the F-ratio and the post hoc comparisons?
- What is the effect size, and what does this mean?
- Graph the means.
Deliverable: Word Document 