A researcher conducts a study of white and black attitudestoward the police in her community.
The percentage of a random sample of white respondents (N = 200)who say they have a favorable attitude toward the police is 53%.The percentage of a random sample of black respondents (N = 200)who say they have a favorable attitude toward the police is45%.
You are asked if there is a real difference between thepercentage of whites and blacks who have a positive attitude towardthe police in the larger population, or is this sample differencelikely to have occurred by random chance or sampling error.
How do you respond? Explain your answer.
Construct a 95% confidence interval for the proportion of Blacksin the population who have a favorable attitude toward thepolice
