If the null hypothesis is false, variability between groups reflects
A) the treatment effect
B) random error
C) random error and possibly the treatment effect
D) random error and the treatment effect

Question

Quizplus · Accepted Answer

If the null hypothesis is false, variability between groups reflects both random error and the treatment effect, as the treatment effect contributes to differences between groups.

If the Null Hypothesis Is False, Variability Between Groups Reflects