Have you heard of the Chi-squared (X^2) test?
http://www.google.com/search?client=safari&rls=en&q=chi+squared+test&ie=UTF-8&oe=UTF-8
Design the appropriate 2x2 table, calculate and interpret the appropriate measure of association.
You suspect that the association between alcohol use and CHD might be confounded by smoking. You collect the following data:
Smokers Non-Smokers
CHD No CHD CHD No CHD
Alcohol Use 80 40 10 20
No Alcohol Use 20 10 40 80
How would you calculate the measure of association?
1 answer