The true causal effect might not be the same in the population studied and the population of interest because
A)of differences in characteristics of the population
B)of geographical differences
C)the study is out of date
D)all of the above

Question

Quizplus · Accepted Answer

The true causal effect might vary between the population studied and the population of interest due to differences in characteristics, geographical differences, and the study being out of date, all of which can influence the applicability and relevance of the study's findings to the population of interest.

The True Causal Effect Might Not Be the Same in the Population