Reference no: EM13583623

Question: A researcher conducted and 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

Between groups                 1,202.313

Within groups                     2118.00

Total                                3,320.313

Drug Condition                 Mean                    N

Control                          36.26                15

Placebo                         33.33                15

Drug /experimental          24.13                 15

a. Complete the ANOVA Summary Table

b. Is F_obt significant at α'= .05; at α' = .01

c. Perform post hoc comparison if necessary

d. What conclusions can be drawn from the F-ration and the post hoc comparisons

e. What is the effect size, and what does this mean

f. Graph the means