Multiple Choice
Ben conducts a study to test the effectiveness of an alcohol treatment program. He surveys the clients twice: once at intake and again six months later. He finds that overall, the treatment program was effective, but approximately 30% of the original sample dropped out of the program so he does not have posttest data for them. Ben has encountered which kind of problem?
A) Instrumentation
B) Mortality
C) Statistical regression
D) Diffusion of treatment
Correct Answer:
Verified
Correct Answer:
Verified
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