Ideally, what should an experiment studying the effect of a cold medicine have?
A) no control group
B) double-blind procedures
C) a small sample size
D) subjects of only one gender

Question

Quizplus · Accepted Answer

Double-blind procedures are necessary to ensure that neither the experimenter nor the subjects know who is receiving the actual medicine or a placebo. This eliminates bias and increases the validity of the study. The other options are not ideal as a control group is necessary in order to compare the effect of the medicine, a small sample size may not be representative of the population, and subjects of only one gender may limit generalization to the larger population.

Ideally, What Should an Experiment Studying the Effect of a Cold