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Question
57 A safety agency was interested in whether penalties for talking on a cell phone while driving reduce the probability that individuals will DO SO. They randomly contacted 100 cell phone users. Fifty were from a state that had a law prohibiting this behavior, and 50 were from a state that had no such law. The data follow:Use Cell Phone While Driving Do Not Use Cell Phone While Driving Total
Law 10 40 50
No Law 20 30 50
Total 30 70 100
a) Calculate the simple probability that someone uses a cell phone while driving.
b) Calculate the joint probability that someone is in a state without the law and uses their cell phone while driving.
c) Calculate the probability that someone will use their cell phone while driving given they live in state with the law.
Answer
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Related questions
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