Use the following scenario to answer question: The Board of Surgeons recommends

Question

Use the following scenario to answer question:
The Board of Surgeons recommends a postoperative examination six months after a prostatectomy. In a sample from the records of Carver Memorial Hospital, follow-up exams were given in 80 out of 200 cases. In a sample of records from HiRent Hospital, follow-up exams were given in 120 out of 200 cases.

Normality may be assumed because
A) the population may be assumed normal.
B) the population may be assumed large.
C) the samples may be assumed random.
D) np = 10, n(1-p) = 10 for both samples.

Explanation / Answer

Normality may be assumed because, n1p1,n2q2, should all be greater than or equal to 5 Hence the answer is D). np=10 and n(1-p)=10 for both samples.

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