In a Random Sample of Patient Records in Cutter Memorial

question 71

Multiple Choice

In a random sample of patient records in Cutter Memorial Hospital, six-month postoperative exams were given in 90 out of 200 prostatectomy patients, while in Paymor Hospital such exams were given in 110 out of 200 cases. In a left-tailed test for equality of proportions, the test statistic is:

• A)-1.96
• B)-2.00
• C)-4.00
• D)-3.48

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Definitions:

Syringe

A medical instrument used to inject or withdraw fluids from the body.

Barrel

A cylindrical container traditionally made of wooden staves bound by iron hoops, used for storing and transporting liquids like wine, oil, and beer.

Elasticity

Ability to return to shape after being stretched.

Spirits of Ammonia

A solution of ammonia in water used as a stimulant, antacid, and astringent, historically in smelling salts to revive someone who has fainted.