In a random sample of 70 patients undergoing a standard surgical procedure, 16 required medication for postoperative pain. In a random sample of 85 patients undergoing a new procedure, only 17 Required medication.
Construct a 98% confidence interval for the difference in the proportions of patients needing pain Medication between the old and new procedures. A physician claims that the proportion of patients Who need pain medication is the same for both procedures. Does the confidence interval contradict
The claim?

Question

Quizplus · Accepted Answer

The confidence interval for the difference in proportions does not include zero, which suggests there is a significant difference between the two procedures in terms of the proportion of patients needing pain medication. Therefore, the confidence interval contradicts the physician's claim that the proportions are the same.

In a Random Sample of 70 Patients Undergoing a Standard