1. Is Vitamin C helpful in preventing the common cold? We wish to conduct an experiment to analyze if 500 mg or 1000 mg of Vitamin C per day can reduce the incidence of colds. Assume that we have 150 subjects available for the study.
a. Discuss how you would conduct the experiment.
b. Explain the general roles of the three requirements of experimental design with particular reference to your design in (a).
c. What are placebos? What is a double-blind study? Why are these important in experimental design?
d. Suppose that it is thought that physically fit people catch cold less easily. How would this influence your design in (a)?