An experiment always involves comparing measurements obtained under one level of the independent variable with measurements obtained under another level of the independent variable.

Question

Quizplus · Accepted Answer

This statement is true. In an experiment, the independent variable is manipulated and its effects on the dependent variable are measured. In order to determine the effect of the independent variable, measurements are taken under one level of the independent variable (the experimental group) and compared to measurements taken under another level of the independent variable (the control group).

An Experiment Always Involves Comparing Measurements Obtained Under One Level