Treatment effects are defined as the difference between a given _____ and the _____.
A)grand mean;population mean
B)sample mean;population mean
C)group mean;grand mean
D)raw score;group mean

Question

Quizplus · Accepted Answer

Treatment effects refer to the difference between the means of the groups receiving different treatments and the grand mean of all the groups. Therefore, the correct option is C, where the given mean refers to group means, and the reference point is the grand mean. The other choices are incorrect because they either refer to a single score (raw score) or a mean that is not the reference point for treatment effects (sample or population mean).

Treatment Effects Are Defined as the Difference Between a Given