Following the steps below, design a randomized comparative experiment to test whether fluoxetine (the active ingredient in Prozac pills) is effective at reducing depression. The participants are 50 people suffering from depression and the response variable is the change on a standard questionnaire measuring level of depression.
(a) Describe how randomization will be used in the design.
(b) Describe how a placebo will be used.
(c) Describe how to make the experiment doubleblind.