Question: Explain whether an experiment or an observational study would be more appropriate to investigate the following: a. Whether or not smoking has an effect on

Explain whether an experiment or an observational study would be more appropriate to investigate the following:
a. Whether or not smoking has an effect on coronary heart disease
b. Whether or not higher SAT scores tend to be positively associated with higher college GPAs
c. Whether or not a special attached to the outside of a catalog makes recipients more likely to order products from a mail-order company

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