The June 2007 Consumer reports claims that there is statistical evidence to back up claim that herb echinace a reduces the length and severity of colds. Cold-Eeze is another medicine which makes same claim. Discuss how researchers could conduct an appropriate experiment to see if either of echinace a pills or Cold-Eeze lozenges show effectiveness in reducing length and severity of colds, and if so, which one does it best. Suppose you've 36 subjects to partake in experiment. Employ a diagram to design this.