Two treatments, heparin and enoxaparin, were compared in a double-blind, randomized clinical trial of patients with coronary artery disease. The subjects can be classified as having a positive or negative response to treatment; the data are given in the following table.

(a) Calculate the sample value of the odds ratio.
(b) Construct a 95% confidence interval for the population value of the odds ratio.
(c) Interpret the confidence interval from part (b) in the context of this setting.

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Heparin Enoxaparin Outcome Negative 309 Positive 1.255 1.564 266 1,341 ,607 Total