In a well-designed experiment, subjects must be ________ in experimental conditions to control for other factors.
A) stratified
B) correlated
C) randomized
D) dispersed
E) controlled

Question

Quizplus · Accepted Answer

Randomization helps to control for other factors by ensuring that all subjects have an equal chance of being placed in either the control or experimental group, and thus any differences between the groups can be attributed to the treatment being tested. Stratification can also be useful, but it is not always necessary or feasible. Correlation, dispersion, and control are not directly related to subject selection in experiments.

In a Well-Designed Experiment, Subjects Must Be ________ in Experimental