Question #6 mentions a variable named "age_ge60." In my coronary calcium data, I already have a variable named "ageover60" - are these the same?
I think if you download the newest version of the coronary calcium data, the variable named age_ge60 is available to be manipulated.
Hope that helps,
Varun
Right - I changed the name to follow the naming convention I recommended in Lecture 3! Sorry about the confusion.