For obese patients, there is an increased risk of complications in the healing of a surgical incision.

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For obese patients, there is an increased risk of complications in the healing of a surgical incision. A practicing surgeon learned of a new type of suturing that might improve surgical wound healing. Patients were randomly selected for the standard treatment, which was used as the control, and the new suturing. The results were as follows:

Find a 95% confidence interval for the difference in complication rates. Is there evidence that the new sutures are better?

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