In the Experimental Evaluation of a New Drug, a Placebo

Multiple Choice

In the experimental evaluation of a new drug, a placebo serves the purpose of:

A) preventing errors in recording of the data.
B) removing the bias of the physician in charge of the experiment.
C) removing the potential psychological bias of the patient in the study.
D) preventing sampling errors from compromising the results of the experiment.
E) increasing the sample size.