7. In a study investigating various risk factors for heart disease, the relationship be tween hypertension and coronary artery disease (CAD) was examined for individ- uals in two different age groups [8]. 3549 Years of Age CAD Hypertension Yes No Yes 552 212 No 941 495 Total 1493 70? 5 Multiple 2 X 2 Contingent\"): Tables More than 65 Years of Age =:m 1102 1189 1018 106 1124 (a) Within each category of age, are the odds of suffering from coronary artery dis- ease greater or smaller for individuals with hypertension? (b) Do you feel that it is appropriate to combine the information in these two tables to make a single unifying statement about the relationship between hyperten- sion and coronary artery disease? Why or why not? (c) Compute the MantelHaenszel estimate of the summary odds ratio. ((1) Construct a 95% condence interval for the summary odds ratio. (e) At the a: = 0.05 level of signicance, test the null hypothesis that there is no association between hypertension and coronary artery disease. What do you conclude