Which of the following is a concern with using mean change as an indicator of a program's effectiveness?
A) stakeholders often do not understand statistical analyses
B) an effect size cannot be computed from this type of data
C) a group average can obscure individual differences in response to the treatment
D) all of the above are concerns

Question

Quizplus · Accepted Answer

Mean change may not accurately represent the effectiveness of a program for each individual in the group. It can also mask individual differences in response to the treatment. While A and B may also be concerns, they are not the main concern with using mean change as an indicator of program effectiveness.

Which of the Following Is a Concern with Using Mean