Question: In a survey for a statistics class project, students in the class were asked whether they commute to school by car (Yes or No) and

In a survey for a statistics class project, students in the class were asked whether they commute to school by car (Yes or No) and whether they had ever received a parking ticket (Yes or No). Of the 23 students who com-muted to school by car, 19 had received a parking ticket. Of the 25 students who did not commute to school by car, seven had received a parking ticket.
a. What is the explanatory variable, and what is the response variable in this survey?
b. Create a contingency table for these data.
c. Find the risk of having ever received a parking ticket for students who commuted by car and the risk for those who did not commute by car.
d. Find the relative risk of receiving a parking ticket for those who commuted by car and those who did not. Write a sentence giving this relative risk in words that would be understood by some-one with no training in statistics.
e. Find the odds of having received a ticket for students who commuted by car, and write the result in a sentence that would be understood by someone with no training in statistics.

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