Statistics Solutions

[Solution] Race and smoking 2005. In 2005 the New Jersey Adult Tobacco Survey found that 22.5 \% of 464 blacks surveyed said that they smoked cigarettes while

Question: Race and smoking 2005. In 2005 the New Jersey Adult Tobacco Survey found that \(22.5 \%\) of 464 blacks surveyed said that they smoked cigarettes while \(18.3 \%\) of 2449 white respondents reported smoking.

  1. Create a \(90 \%\) confidence interval for the difference in the percentage of smokers between black and white adults in New Jersey.
  2. Does this survey indicate a race-based difference in smoking among American adults? Explain, using your confidence interval to test an appropriate hypothesis.
  3. What alpha level did your test use?

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