In experimental research, cause-and-effect statements should not be made unless
A) the sample groups are significantly different before the independent variable is introduced
B) the sample groups are significantly different after the independent variable is introduced
C) the sample groups represent a common population after the independent variable is introduced
D) the null hypothesis is accepted

Question

Quizplus · Accepted Answer

Cause-and-effect statements should be made only if there is a significant difference in the sample groups after the independent variable is introduced. This difference indicates that the independent variable had an effect on the dependent variable, allowing for a cause-and-effect statement to be made.

In Experimental Research, Cause-And-Effect Statements Should Not Be Made Unless