A research report on a prospective study states that: “A comparison of the 90 normal patients with the 50 patients with hypotension shows that only 3.33% of the former group died as compared to 30% of the latter.” (a) Put these data into a 2x2 contingency table and calculate the sample risk difference, construct a 95% confidence interval and provide an interpretation.  (b) Calculate sample relative risk, construct 95% confidence interval, and provide interpretation.

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A:

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