Fred did a study to see if a psychiatric patients respond to a better to a certain kind of therapy. He arranged for patients to be randomly assigned to different therapy groups and monitored their depressive symptoms. He obtained the following results : F(,4,25)=3.84, p>.01.
a. How many groups did he have in his entire study?
b. How many total patients did he have in his entire study?
c. What was his basic conclusions?
d. What do you might imagine influenced his desicion to set alpha at .01?