Which of the following is the best description of a randomized experiment?
A) an experiment in which the treatments are assigned randomly to experimental units
B) an experiment in which the investigators are chosen at random
C) an experiment in which the outcomes are random
D) an experiment in which the experimental units are selected at random

Question

Quizplus · Accepted Answer

A randomized experiment is one where the treatments (or interventions) are assigned randomly to the experimental units. This is done in order to reduce bias and ensure that the observed relationship between the treatments and outcomes is not due to chance or confounding factors. Options B, C, and D do not correctly describe a randomized experiment.

Which of the Following Is the Best Description of a Randomized