Teens who smoke typically have friends who smoke.To avoid overestimating the impact of peer pressure on teen's smoking habits,it would make most sense to consider the importance of

Question

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A selection effect should be considered to avoid overestimating the impact of peer pressure on teen's smoking habits. This is because teens may choose friends who share similar habits or interests, including smoking, rather than their friends influencing them to smoke. Therefore, it is important to consider whether the peer group was already smoking before the teen joined or if the teen influenced the peer group to begin smoking.

Teens Who Smoke Typically Have Friends Who Smoke