Pain after surgery: In a random sample of 57 patients undergoing a standard surgical procedure, 16 required medication for postoperative pain. In a random sample of 80 patients undergoing a new...

Extracted text: Pain after surgery: In a random sample of 57 patients undergoing a standard surgical procedure, 16 required medication for postoperative pain. In a random sample of 80 patients undergoing a new procedure, only 13 required pain medication. Part: 0 / 2 Part 1 of 2 (a) Construct an 80% confidence interval for the difference in the proportions of patients needing pain medication between the old and new procedures. Let p, denote the proportion of patients who had the old procedure needing pain medication. Use tables to find the critical value and round the answer to at least three decimal places. An 80% confidence interval for the difference in the proportions of patients needing pain medication between the old and new procedures is N< [u:="" dec="" w="" macbook="" air="" dd="" 80="" f10="" fb="" f9="" f7="" f5="" f6="" f4="" f1="" f3="" @="" #3="" %24="" %="">