SOLUTION: "The University of Michigan study, collected survey data from parents on each child's sleep habits and asked both parents and teachers to assess behavioral concerns. About a third

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Question 1132791: "The University of Michigan study, collected survey data from parents on each child's sleep habits and asked both parents and teachers to assess behavioral concerns. About a third of the students studied were identified by parents or teachers as having problems with disruptive behavior or bullying. The researchers found that children who had behavioral issues and those who were identified as bullies were twice as likely to have shown symptoms of sleep disorders."

Multiple Choice: A friend of yours who read the article says, "The study shows that sleep disorders lead to bullying in school children." Is this statement justified? If not, how best can you describe the conclusion that can be drawn from this study?
(a) Yes, this is an observational study
(b) Yes, this is an experimental study
(c) No, this is an observational study
(d) No, this is an experimental study
Answer by Boreal(15235) About Me  (Show Source):
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No, this is an observational study. It is observational, because no variables were manipulated. There is a relationship between the behavior and sleep, but it is not necessarily causal, so that conclusion cannot be drawn.