2.13. Explain whether an experiment or an observational study would be more appropriate to investigate the following:

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2.13. Explain whether an experiment or an observational study would be more appropriate to investigate the following:

(a) Whether or not cities with higher unemployment rates tend to have higher crime rates

(b) Whether a Honda Accord or a Toyota Camry gets better gas mileage

(c) Whether or not higher college CPAs tend to occur for students who had higher scores on college entrance exams

(d) Whether or not a special coupon attached to the outside of a catalog makes recipients more likely to order products from a mail-order company

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