If an independent variable has more variance, is it more difficult or easier to detect an effect on the dependent variable?
A) more difficult, but only if the dependent variable also has lots of variance
B) easier, but only if the dependent variable has much less variance
C) more difficult
D) easier
E) The answer cannot be determined.

Question

Quizplus · Accepted Answer

Higher variance in an independent variable generally makes it easier to detect an effect on the dependent variable because it provides more information about the relationship between the variables.

If an Independent Variable Has More Variance, Is It More