Suppose an independent variable does not have any effect on the dependent variable in a single-factor experiment.Which of the following is one of the reasons for being cautious about saying that the independent variable is irrelevant?
A) We know the independent variable could interact with another independent variable when used in a complex design.
B) We can assume this independent variable would not have an effect if different levels of the variable had been tested.
C) We know that experiments in which an independent variable does not have an effect are inherently uninterpretable.
D) We know that single-factor experiments cannot be used to identify relevant independent variables.

Question

Quizplus · Accepted Answer

Even though the independent variable did not have an effect in the single-factor experiment, it is possible that it may interact with another independent variable in a more complex design. Therefore, we should be cautious about saying that it is irrelevant.

Suppose an Independent Variable Does Not Have Any Effect on the Dependent