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20 Jun 2019, 03:07
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
85%
(hard)
Question Stats:
40% (02:14) correct
60%
(02:07)
wrong
based on 60
sessions
History
Date
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Not Attempted Yet
A new study reports that every U.S. president has had an IQ that placed him in the top two percent of the population: 138 or above. However, a different study focusing on leadership ability and potential concluded that the optimal IQ for a national leader is 125-above average, but not in the top two percent. Therefore, no United States president has had an IQ optimal for a national leader.
Which of the following, if true, most seriously weakens the conclusion above?
A. President John F. Kennedy’s IQ as reported in the second study was 127; in the first, 159.
B. A president’s election in the US depends less on his leadership potential than on the public’s perception of his intelligence.
C. Leadership ability in the second study was determined by studying the IQs of current national leaders from 100 different countries around the world.
D. The calculation of IQ is not an exact science; the margin of error can be as great as 3-4%.
E. IQ is only one of many factors that determines a national leader’s success.
Which of the following, if true, most seriously weakens the conclusion above?
A. President John F. Kennedy’s IQ as reported in the second study was 127; in the first, 159.
B. A president’s election in the US depends less on his leadership potential than on the public’s perception of his intelligence.
C. Leadership ability in the second study was determined by studying the IQs of current national leaders from 100 different countries around the world.
D. The calculation of IQ is not an exact science; the margin of error can be as great as 3-4%.
E. IQ is only one of many factors that determines a national leader’s success.
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saukrit
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20 Jun 2019, 03:33
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Premises
Avg iq of prez =138
Avg iq of national leaders =125
Conclusion
No prez had an iq optimal.for national leaders
We can weaken it if we prove even 1 prez had the iq in the range of good national leaders.
A) gives a hope that the iq of prez Kennedy was actually in the range near 125 and hence should be a good opponent for weakeners.
Moreover, this also questions the accuracy of the iq measure itself
B)does not attack the conclusion. Out of scope
C) This may strengthen, but in no way weaken the conclusion
D) even 3-4% does not harm the conclusion 125+4% =130. Does not weaken
E) This talks about factors affecting leadership quality, but this is irrelevant wrt our conclusion. Hence remains harmless.
Imo, Answer must be A
Posted from my mobile device
Avg iq of prez =138
Avg iq of national leaders =125
Conclusion
No prez had an iq optimal.for national leaders
We can weaken it if we prove even 1 prez had the iq in the range of good national leaders.
A) gives a hope that the iq of prez Kennedy was actually in the range near 125 and hence should be a good opponent for weakeners.
Moreover, this also questions the accuracy of the iq measure itself
B)does not attack the conclusion. Out of scope
C) This may strengthen, but in no way weaken the conclusion
D) even 3-4% does not harm the conclusion 125+4% =130. Does not weaken
E) This talks about factors affecting leadership quality, but this is irrelevant wrt our conclusion. Hence remains harmless.
Imo, Answer must be A
Posted from my mobile device
21 Jun 2019, 09:32
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When the answer choices discuss "the first study", I can't even tell from the wording of the stem which study they're talking about. Do they mean the "new study" that is mentioned first in the passage? Or do they mean the other study, the one that presumably is not as new, that was conducted first? There's no way to guess.
The argument essentially says "every value in a set is 138 or greater. Therefore no value was 125." That's an airtight argument unless there's something wrong with the data. Answer A tells us that the studies disagreed on at least one data point, so there's something wrong with the data in one of the studies. So A is a good answer. But I think C is also a justifiable answer: there's no reason to think data collected about 100 current national leaders should be applicable to US Presidents from the 1800s. How do we know "optimal IQ" has remained constant? Add to that the absurd premise that an "optimal IQ for a leader" could even exist, and this question doesn't seem to be worth any study.
The argument essentially says "every value in a set is 138 or greater. Therefore no value was 125." That's an airtight argument unless there's something wrong with the data. Answer A tells us that the studies disagreed on at least one data point, so there's something wrong with the data in one of the studies. So A is a good answer. But I think C is also a justifiable answer: there's no reason to think data collected about 100 current national leaders should be applicable to US Presidents from the 1800s. How do we know "optimal IQ" has remained constant? Add to that the absurd premise that an "optimal IQ for a leader" could even exist, and this question doesn't seem to be worth any study.
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