Race and smoking 2010 Data collected in 2010 by theBehavioral Risk Factor Surveillance System revealedthat in the state of New Jersey, 15.7% of whites and15.9% of blacks were cigarette smokers. Suppose theseproportions were based on samples of 2449 whites and464 blacks.a) Create a 90% confidence interval for the difference inthe percentage of smokers between black and whiteadults in New Jersey.b) Does this survey indicate a race-based difference insmoking among New Jersey adults? Explain, using yourconfidence interval to test an appropriate hypothesis.c) What alpha level did your test use?

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.