Just Anser D ,E, F A research study was conducted to examine the clinical efficacy of a new antidepressant. Depressed patients were randomly assigned to one of three groups: a placebo group, a group...

Just Anser D ,E,  F

A research study was conducted to examine the clinical efficacy of a new antidepressant. Depressed patients were randomly assigned to one of three groups: a placebo group, a group that received a low dose of the drug, and a group that received a moderate dose of the drug. After four weeks of treatment, the patients completed the Beck Depression Inventory. The higher the score, the more depressed the patient. The data are presented in the Table below .  Compute the appropriate test using 5% significant level.


Placebo               Low Dose           Moderate Dose
38                            22                           14
47                           19                            26
39                           8                              11
25                          23                             18
42                          31                              5
a) What would be the null hypothesis in this study?
b) What would be the alternate hypothesis?
c) What is your Fcrit?

d) Is there a significant difference between the groups?


e) If there is a significant difference, where specifically are the differences?


f) Interpret your answer