(Answered) Question marijuana and traffic accidents 11 researchers in

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Question: Marijuana and traffic accidents (1.1) Researchers in New Zealand interviewed 907 drivers at age 21. They had data on traffic accidents and they asked the drivers about marijuana use. Here are data on the numbers of accidents caused by these drivers at age 19, broken down by marijuana use at the same age:29

(a) Make a graph that displays the accident rate for each class. Is there evidence of an association between marijuana use and traffic accidents?

(b) Explain why we can't conclude that marijuana use causes accidents.

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