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:

Molybdenum

A chemical element with the symbol Mo and atomic number 42, known for its high strength and resistance to heat, often used in steel alloys.

Toughness

The ability of a material to absorb energy and plastically deform without fracturing.

Toughener

A substance added to materials to increase their toughness, making them more resistant to impact and less likely to crack.

Nickel

A hard, malleable, and ductile metallic element, primarily used in alloys and as a catalyst.