Which of the following is least likely to be true of a 2 × 2 factorial design?
A) There may or may not be a significant main effect for independent variable A.
B) There are two independent variables, each with two levels in a 2 × 2 factorial design.
C) There may or may not be a significant main effect for independent variable B.
D) There is always a significant interaction between the independent variables.

Question

Quizplus · Accepted Answer

It is not always true that there will be a significant interaction between the two independent variables in a 2 × 2 factorial design. The presence of an interaction depends on whether the effects of one independent variable differ across levels of the other independent variable. In some cases, there may be no interaction, indicating that the effects of one independent variable are the same at both levels of the other independent variable.

Which of the Following Is Least Likely to Be True