Duke

 Review the database NCbirths. Describe the limitations that may exist if this database is used as a sample of all North Carolina births.

1. Conduct an examination of the impact of smoking and marital status on birthweight using Analysis of Variance as described in chapter XV of the online textbook.
2. Construct a chi-square analysis of the relationship between smoking and ethnicity as described in chapter XVII of the online textbook.
3. Write a short report (1 to 2 pages for each variable) that includes the results of your analysis and answers the following questions:
4. Write a research question appropriate for each analysis.
5. What is the null and alternative hypothesis for each analysis?
6. What were the results of each analysis? Describe what relationships, if any, were significant and the decision made concerning the null hypothesis.