An experiment may produce null results because
A) the levels of the independent variable are too similar to each other
B) not enough participants are used held
C) the study was not sufficiently standardized
D) all of the above

Question

Quizplus · Accepted Answer

All of the above options can lead to null results: similar levels of the independent variable may not show a difference, insufficient participants may lack statistical power, and lack of standardization can introduce variability.

An Experiment May Produce Null Results Because