Consider a completely randomized experiment in which a control group is given a placebo for congestion relief and a treatment group

double-blind

#1

Consider a completely randomized experiment in which a control group is given a placebo for congestion relief and a treatment group is given a new drug for congestion relief. Describe a double-blind procedure for this experiment and discuss some benefits of such a procedure.

Answer:

In this procedure the drug and the placebo should be given in such a way so that researcher or no one in both of that group will not know which drugs are given to them.

Benefits:

1. The procedure increase the reliability and validiy of the experiments.
2. Avoid errors arising from biasness.