Question: A. typical hour of prime-time television shows three to live violent acts. Lin king fancily interviews and police records shows a clear association between time spent watching TV as a child and later aggressive behavior.'

(a) Explain why this is an observational study rather than an experiment. What are the explanatory and response variables?

(b) Suggest several lurking variables describing a child's home life that may be confounded with how much TV he or she watches. Explain why con-founding makes it difficult to conclude that more TV causes more aggressive behavior.