In a random sample of patient records in Cutter Memorial Hospital, six-month postoperative exams were given in 90 out of 200 cases, while in Paymor Hospital such exams were given in 110 out of 200 cases. The pooled proportion is:
A).50
B).40
C).30
D).20

Question

Quizplus · Accepted Answer

The pooled proportion is calculated by combining the successes and total cases from both hospitals and then dividing the total successes by the total cases. For Cutter Memorial, 90 out of 200 exams were given, and for Paymor, 110 out of 200 exams were given. Combined, this is 200 out of 400, or 50%.

In a Random Sample of Patient Records in Cutter Memorial