8- Consider the following research question:

Is there a difference in the risk of cardiovascular disease between men and women? To answer this question, individuals were classified by gender and whether or not they currently have cardiovascular disease.

The role type classification for this problem is:

C -> C

Q -> C

Q -> Q

C -> Q

9- Consider the following research question:

Is there any difference in the cost of treatment (in dollars) for riders injured in motorcycle crashes between those who were wearing motorcycle protective clothing compared to those who were not?

The role type classification for this problem is:

Q -> Q

Q -> C

C -> C

C -> Q

10- Consider the following research question:

Can we predict the mortality (in deaths per 10 million) due to skin cancer (in each of the 50 U.S. states) using the latitude (in degrees) at the center of each of the 50 U.S. states?

The role type classification for this problem is:

C -> C

Q -> C

Q -> Q

C -> Q

11- Consider the following research question:

Which exercise program (standard or alternative) is most effective in treating patients with chronic low back pain? After treatment, patients are assessed and classified into three groups, reduced low back pain, no change in low back pain, increase in low back pain.

The role type classification for this problem is:

C -> C

Q -> Q

Q -> C

C -> Q