Bicycle Helmet
Consider the following “advertisement” for bicycle helmets (which actually appeared in a magazine).
80 cyclists died this year in car/bicycle collisions.
Only 24 of these were wearing helmets.
Always wear a helmet when cycling!
(a) Discuss this ad. What do you think its purpose is? What conclusion does it want you to draw? Do the data it presents justify this conclusion? You explanation should use the ideas of conditional probability but be accessible and informative to someone who had not formally encountered those ideas.
(b) Present what you think would be a better ad, manufacturing additional data if you need to. But remember—effective ads need to be as simple and direct as possible.