Race and smoking 2010 Data collected in 2010 by the Behavioral Risk Factor Surveillance System revealed that in the state of New Jersey, 15.7% of whites and 15.9% of blacks were cigarette smokers....

Race and smoking 2010 Data collected in 2010 by the Behavioral Risk Factor Surveillance System revealed that in the state of New Jersey, 15.7% of whites and 15.9% of blacks were cigarette smokers. Suppose these proportions were based on samples of 2449 whites and 464 blacks.

 a) Create a 90% confidence interval for the difference in the percentage of smokers between black and white adults in New Jersey.

 b) Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis.

 c) What alpha level did your test use?