A study of 36,080 persons who had heart attacks found that men were more likely to survive than were women. The following table shows some of the data collected in the study.

(a) Calculate the odds ratio for comparing survival of men to survival of women.
(b) Calculate a 95 % confidence interval for the population value of the odds ratio.
(c) Does the odds ratio give a good approximation to the relative risk for these data? Why or why not?

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Men Women Survived at Yes25,339 8,914 least 24 hours? No 1141 68 Total 26,480 9.600