QUESTION: 341

Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?

In cases where X occurs but Y does not, X is usually followed by Z.
In cases where X occurs, followed by Y, Y is usually followed by Z.
In cases where Y occurs but X does not, Y is usually followed by Z.
In cases where Y occurs but Z does not, Y is usually preceded by X.
In cases where Z occurs, it is usually preceded by X and Y.

Answer(s): A

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QUESTION: 342

Mr. Primm: If hospitals were private enterprises, dependent on profits for their survival, there would be no teaching hospitals, because of the intrinsically high cost of running such hospitals.
Ms. Nakai: I disagree. The medical challenges provided by teaching hospitals attract the very best physicians. This, in turn, enables those hospitals to concentrate on no routine cases.

Which of the following, if true, would most strengthen Ms. Nakai’s attempt to refute Mr. Primm’s claim?

Doctors at teaching hospitals command high salaries.
Sophisticated, no routine medical care commands a high price.
Existing teaching hospitals derive some revenue from public subsidies.
The patient mortality rate at teaching hospitals is high.
The modern trend among physicians is to become highly specialized.

Answer(s): B

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QUESTION: 343

A recent survey of all auto accident victims in Dole County found that, of the severely injured drivers and front- seat passengers, 80 percent were not wearing seat belts at the time of their accidents. This indicates that, by wearing seat belts, drivers and front-seat passengers can greatly reduce their risk of being severely injured if they are in an auto accident.
The conclusion above is not properly drawn unless which of the following is true?

Of all the drivers and front-seat passengers in the survey, more than 20 percent were wearing seat belts at the time of their accidents.
Considerably more than 20 percent of drivers and front-seat passengers in Dole County always wear seat belts when traveling by car.
More drivers and front-seat passengers in the survey than rear-seat passengers were very severely injured.
More than half of the drivers and front-seat passengers in the survey were not wearing seat belts at the time of their accidents.
Most of the auto accidents reported to police in Dole County do not involve any serious injury.

Answer(s): A

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QUESTION: 344

Six months or so after getting a video recorder, many early buyers apparently lost interest in obtaining videos to watch on it. The trade of businesses selling and renting videos is still buoyant, because the number of homes with video recorders is still growing. But clearly, once the market for video recorders is saturated, businesses distributing videos face hard times.
Which of the following, if true, would most seriously weaken the conclusion above?

The market for video recorders would not be considered saturated until there was one in 80 percent of homes.
Among the items handled by video distributors are many films specifically produced as video features.
Few of the early buyers of video recorders raised any complaints about performance aspects of the new product.
The early buyers of a novel product are always people who are quick to acquire novelties, but also often as quick to tire of them.
In a shrinking market, competition always intensifies and marginal businesses fail.

Answer(s): D

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QUESTION: 341

QUESTION: 342

QUESTION: 343

QUESTION: 344