The investigator stratied the results, separately for the older subjects (aged 65 and over) and the younger subjects (aged 4064). They were able to establish the following facts: . Of the 1,550 men who were bald and had CHD, 1,500 were older and 50 were youngen . Of the 18,450 men who were bald and did not have CHD, 13,500 were older and 4,950 were younger. 0 Of the 380 men who were hairy and had CHD, 200 were older and180 were younger. . Of the 19,620 men who were hairy and did not have CHD, 1,800 were older and 17,820 were younger. 3. Create two 2 x 2 tables for the stratied results Older Subjects | CHD No CHD Total Bald | Hairy | Total | Younger Subjects | CHD | No CHD | Total Bald | | | Hairy | | | Total ' | | . Calculate the incidence of CHD in the older men. (This is NOT asking for the risk ratio. Incidence is the total number of cases in the group divided by the total population of the group multiplied by a rate base) . Calculate the incidence of CHD in the younger men. (This is NOT asking for the risk ratio. Incidence is the total number of cases in the group divided by the total population of the group multiplied by a rate base) Based on the incidences calculated, does there appear to be an association between age and CHD? Explain your answer. 7. What proportion of the older men is bald'? {This is asking the percent of bald older men out of all the older men) 8. What proportion of the younger men is bald? (This is asking the percent of bald younger men out of all the younger men) 9. Based on the proportion of bald men in each group, does there appear to be an association between age and baldness? 10. After looking at the incidences of CHD by age and the proportion of bald men by age, does the association between baldness and CHD appear to be confounded by age? Explain your answer. 11. Calculate the Risk Ratio of CHD associated with baldness in the stratum of older men. Include an interpretation of the Risk Ratio. 12. Calculate the Risk Ratio of CHD in the stratum of younger men. Include an interpretation of the Risk Ratio. 13. Compare the risk ratios in Questions 11 and 12 with each other and with the overall risk ratio you calculated in Question 1. Do these results suggest that the association between baldness and CHD is confounded by age? Why or why not