16.   A violin constructed to have improved sound would sound different from the best-sounding existing violins.To professional violinists, a violin that sounds different from the best-sounding existing violins sounds less like a violin and therefore worse than the best-sounding existing violins.Professional violinists are the only accepted judges of the sound quality of violins.

Would be the best supported by those statements?

(A) Only amateur violinists should be asked to judge the sound quality of newly constructed violins.

(B) Professional violinists supervise the construction of violins.

(C) The best-sounding existing violins have been in existence fro several centuries.

(D) It is currently impossible to construct a violin that the only accepted judges will evaluate as having improved sound

(E) It is possible to construct a violin that sounds better than the best-sounding existing violins to everyone but professional violinists.

17.   The fact that several of the largest senior citizens’ organizations are constituted almost exclusively of middle-class elderly people has led critics to question the seriousness of those organizations’ commitment to speaking out on behalf of the needs of economically disadvantaged elderly people.

Which of the following generalizations, if true, would help to substantiate the criticism implicit in the statement above?

(A) The ideology of an organization tends reflect the traditional political climate of its locale.

(B) The needs of disadvantaged elderly people differ in some ways from those of other disadvantaged groups within contemporary society.

(C) Organized groups are better able to publicize their problems and seek redress than individuals acting alone.

(D) Middle-class elderly people are more likely to join organizations than are economically disadvantaged elderly people

(E) People usually join organizations whose purpose is to further the economic, political, or social interests of their members.

18.   Corporate Officer: Last year was an unusually poor one for our chemical division, which has traditionally contributed about 60 percent of the corporation’s profits. It is therefore encouraging that there is the following evidence that the pharmaceutical division is growing stronger: it contributed 45 percent of the corporation’s profits, up from 20 percent the previous year.

On the basis of the facts stated, which of the following is the best critique of the evidence presented above?

(A) The increase in the pharmaceutical division’s contribution to corporation profits could have resulted largely from the introduction of single, important new product.

(B) In multidivisional corporations that have pharmaceutical divisions, over half of the corporation’s profits usually come from the pharmaceuticals.

(C) The percentage of the corporation’s profits attributable to the pharmaceutical division could have increased even if that division’s performance had not improved.

(D) The information cited does not make it possible to determine whether the 20 percent share of profits cited was itself an improvement over the year before.

(E) The information cited does not make it possible to compare the performance of the chemical and pharmaceutical divisions in of the percent of total profits attributable to each.

19.   Identical twins tend to have similar personalities; if environment outweighs heredity in personality development, twins raised together should presumably have more similar personalities than those raised apart. A recent study of identical twins in both situations measured 11 key traits through a questionnaire, and concluded that 7 of the 11 are primarily products of heredity.

Which of the following, if established, would cast the most doubt on the study’s results?

(A) Fewer than half of the pairs of twins studied were raised separately.

(B) The ages of all of the twins studied fell within a 10-year range.

(C) Some of the traits that the study attributed to heredity developed in the separately raised twins because those pairs all grew up in similar families.

(D) Although over half the traits measured were determined to be linked to heredity, the nature of those traits varied widely

(E) The 11 traits that were measured constitute a representative sample of larger, generally accepted pool of key personality traits.

20.   When people predict that certain result will not take place unless a certain action is taken, they believe that they have learned that the prediction is correct when the action is taken and the result occurs. On reflection, however, it often becomes clear that the result admits of more than one interpretation.

Which of the following, if true, best supports the claims above?

(A) Judging the success of an action requires specifying the goal of the action.

(B) Judging which action to take after a prediction is made requires knowing about other actions that have been successful in similar past situations.

(C) Learning whether a certain predictive strategy is good requires knowing the result using that strategy through several trials.

(D) Distinguishing a correct prediction and effective action from an incorrect prediction and ineffective action is often impossible.

(E) Making a successful prediction requires knowing the facts about the context of that prediction.

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