48. In a recent poll, 71% of respondents reported that they cast votes in the
most recent national election. Voting records show, however, that only
60% of eligible voters actually voted in that election.
Which of the following pieces of evidence, if true, would provide the best
explanation for the apparent discrepancy?
(A)
The margin of error for the survey was plus or minus five
percentage points.
(B)
15% of the survey’s respondents were living overseas at the time of
the election.
(C)
Prior research has shown that people who actually do vote are also
more likely to respond to polls than those who do not vote.
(D)
Many people who intend to vote are prevented from doing so by
last-minute conflicts on election day or other complications.
(E)
Some people confused the national election with other recent
elections when responding to the poll.
49. Scientists recently documented that influenza spreads around the world
more efficiently in the modern era due to commercial air travel. Flu
symptoms are severe enough that the ill would likely cancel or reschedule
air travel, but an infected person can travel across the globe before the first
signs appear. Further, if symptoms develop while someone is on a plane,
the infected person’s cough can spread the virus easily in the enclosed and
closely packed environment.
Which of the following would best minimize the role air travel can play in
the spread of influenza during a pandemic?
(A)
Installing air filtration systems in the planes to kill any flu virus
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