Evaluate the effectiveness of a new drug to prevent preterm

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A clinical trial is conducted to evaluate the effectiveness of a new drug to prevent preterm delivery. A total of n=250 pregnant women agree to participate and are randomly assigned to receive either the new drug or a placebo and followed through the course of pregnancy. Among 125 women receiving the new drug, 24 deliver preterm, and among 125 women receiving the placebo, 38 deliver preterm. Construct a 95% confidence interval for the difference in proportions of women who deliver preterm. What is the Upper Limit CI & Lower Limit CI ?

Reference no: EM13339035

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