A cohort study of smoking and anxiety was conducted at a university campus. There were a total of 3,000 freshmen who participated. 1,000 were smokers, and 2,000 were never smokers. Of the smokers, 500 developed anxiety during the 4 months of follow-up period. Of the non-smokers, 400 developed anxiety during the same time period. Assume that no one in the population died or was lost during the follow-up period. 

1. State the null hypothesis and alternative hypothesis in this study. 

2. Construct a two by two table with the given data, making sure that you have labeled the table margins correctly. 

3. What is the best measure of association in this study? What are the values of measure of association corresponding to the null hypothesis and alternative hypothesis?

Answer rating: 100% (QA)

1 H0 There is an equal probability for developing anxiety for smokers and nonsmokers H1 Smokers have ... View the full answer