When the population means in the two conditions defining the difference scores are _____,the mean difference score across all individuals in the population will equal _____.
A)equivalent;0
B)nonequivalent;0
C)equivalent;1.0
D)none of these

Question

Quizplus · Accepted Answer

When the population means in the two conditions are equivalent, the mean difference score across all individuals in the population will be 0. This is because if the means are the same, there is no difference between the conditions and therefore no difference score.

When the Population Means in the Two Conditions Defining the Difference