Is there a way that the medical field classifies diseases based on how preventative they are by an individual's actions? For instance obesity related diseases are very preventable but genetic diseases are not very preventable.
In an OLS regression the coefficient is b = cov(X,Y)/var(X). What is the plain english interpretation of this coefficient in terms of variations (ie. b is the variation in Y that can be explained by variation in X)? How does this relate to r^2?
Are there any estimates that exist of the value to a football team (not the host city) of winning the Super Bowl? [more inside]