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Chi- Square

1. A researcher wants to test for a relationship between the number of citizen complaints that a police officer receives and whether that officer commits serious misconduct. He gathers a sample of officers and records the number of complaints that have been lodged against them (0 – 2, 3 – 5, 6+) and whether they have ever been written up for misconduct (yes or no). Can he use a chi-square to test for a relationship between these two variables? Why or why not?

2. A researcher wishes to test for a relationship between age and criminal offending. She gathers a sample and for each person, she collects his or her age (in years) and whether that person has ever committed a crime (yes or no). Can she use a chi- square to test for a relationship between these two variables? Why or why not?

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3. A researcher is interested in finding out whether people who drive vehicles that are in bad condition are more likely than those driving better cars to get pulled over by police. She collects a sample and codes each person’s vehicle’s condition (good,

fair, poor) and the number of times that person has been pulled over (measured by respondents writing in the correct number). Can she use a chi-square to test for a relationship between these two variables? Why or why not?

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