QUESTION: 241

Since the passage of the state’s Clean Air Act ten years ago, the level of industrial pollutants in the air has fallen by an average of 18 percent. This suggests that the restrictions on industry embodied in the act have worked effectively. However, during the same period the state has also suffered through a period of economic decline. The number of businesses in the state has fallen by 10 percent, and the number of workers employed has fallen by 12 percent. It is probable that the business decline, rather than the regulations in the act, is responsible for at least half of the decline in the pollution.

Which of following is an assumption made in the passage above?

Most businesses in the state have obeyed the regulations embodied in the Clean Air Act.
The economic decline of the state can be attributed, in part, to the effects of the Clean Air Act.
The amount of air pollution in a given area is likely to be proportional to the number of businesses and workers active in that area.
The restrictions on business activity in other states are less stringent than are those embodied in the Clean Air Act.
The Clean Air Act has been only very slightly successful in achieving the goal of reduced air pollution.

Answer(s): C

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QUESTION: 242

Since the passage of the state’s Clean Air Act ten years ago, the level of industrial pollutants in the air has fallen by an average of 18 percent. This suggests that the restrictions on industry embodied in the act have worked effectively. However, during the same period the state has also suffered through a period of economic decline. The number of businesses in the state has fallen by 10 percent, and the number of workers employed has fallen by 12 percent. It is probable that the business decline, rather than the regulations in the act, is responsible for at least half of the decline in the pollution.

Which of the following, if true, would most seriously weaken the conclusion drawn in the passage above?

During the last ten years, economic conditions in the nation as a whole have been worse than those within the state.
Amendments to the Clean Air Act that were enacted six years ago have substantially strengthened its restrictions on industrial air pollution.
Of the businesses that ceased operating in the state during the last ten years, only 5 percent were engaged in air-polluting industries.
Several large corporations left the state during the last ten years partly in order to avoid compliance with the Clean Air Act.
Due to its small budget, the state office charged with enforcement of the Clean Air Act has prosecuted only two violators of the law since its passage.

Answer(s): C

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QUESTION: 243

A nutritionist studying the effects of massive doses of vitamin C found that of a group of 600 people who regularly took 1,500 mg of vitamin C daily for a year, fewer than 9 percent suffered serious cases of flu; of a group of 600 people who took 250 mg of vitamin C (the standard recommended daily allowance) daily for a year, 34 percent suffered at least one serious case of flu; and of a group of 600 people who took no vitamin C for a year (other than that found in the foods in a balanced diet), 32 percent suffered at least one serious case of flu.

Which of the following hypotheses is best supported by the evidence above?

The effectiveness of vitamin C in preventing serious cases of flu increases in direct proportion to the amount of vitamin C taken.
Vitamin C is helpful in preventing disease.
Doses of vitamin C that exceed the standard recommended daily allowance by 500 percent will reduce the incidence of serious cases of flu by 25 percent.
Massive doses of vitamin C can help to prevent serious case of flu.
A balanced diet contains less than 250 mg of vitamin C.

Answer(s): D

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QUESTION: 244

Susan: Those who oppose experimentation on animals do not properly value the preservation of human life. Although animal suffering is unfortunate, it is justifiable if it can lead to cures for human ailments.
Melvin: But much animal experimentation involves testing of ordinary consumer products such as soaps, dyes, and cosmetics.
Susan: These experiments are justifiable on the same grounds, since cleanliness, convenience, and beauty are worthwhile human values deserving of support.

Which of the following is the best statement of the logical flaw in Susan’s argument?

Her claim that animal experimentation is justifiable if it supports human values contradicts her claim that such experimentation is justifiable only if it leads to cures for human ailments.
She places a higher value on human cleanliness, convenience, and beauty than she does on the preservation of animal life.
She uses the word “value” in two different senses.
She assumes that all ordinary consumer products aid in the preservation of human life.
She fails to show how mere support for human values actually preserves human lives.

Answer(s): E

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QUESTION: 241

QUESTION: 242

QUESTION: 243

QUESTION: 244