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A recent report shows that the number of collisions between vehicles
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17 May 2021, 05:30
17 May 2021, 05:30
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A
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Difficulty:
35%
(medium)
Question Stats:
67% (01:28) correct
33%
(01:41)
wrong
based on 262
sessions
A recent report shows that the number of collisions between vehicles at junctions with electronic advertising signs, and the number of such collisions at junctions that do not have such signs, are the same. The installation of electronic advertising signs at junctions, therefore, does not affect road safety.
Which of the following would it be most useful to establish in order to evaluate the argument?
A. Whether the current figures for road accidents can be reduced by improving certain conditions such as lighting
B. Whether the companies that install the electronic signs have official government approval to do so
C. Whether more than 50% of the collisions that take place at junctions are fatal
D. Whether the companies being advertised by the electronic signs report increases in the number of customers that approach them
E. Whether the figures for accidents involving pedestrians are also the same for both types of junction
Which of the following would it be most useful to establish in order to evaluate the argument?
A. Whether the current figures for road accidents can be reduced by improving certain conditions such as lighting
B. Whether the companies that install the electronic signs have official government approval to do so
C. Whether more than 50% of the collisions that take place at junctions are fatal
D. Whether the companies being advertised by the electronic signs report increases in the number of customers that approach them
E. Whether the figures for accidents involving pedestrians are also the same for both types of junction
Re: A recent report shows that the number of collisions between vehicles
[#permalink]
23 May 2021, 04:45
23 May 2021, 04:45
1
Kudos
Expert Reply
OFFICIAL EXPLANATION
A recent report shows that the number of collisions between vehicles at junctions with electronic advertising signs, and the number of such collisions at junctions that do not have such signs, are the same. The installation of electronic advertising signs at junctions, therefore, does not affect road safety.
Which of the following would it be most useful to establish in order to evaluate the argument?
A. Whether the current figures for road accidents can be reduced by improving certain conditions such as lighting
Incorrect.
To solve this Investigation question, first break down the argument. The first sentence is factual, a premise. The last sentence begins with the conclusion conjunction Therefore so it's the argument's conclusion.
- Premise A: junctions with and without electronic signs have the same number of car collisions
=
Conclusion: electronic signs do not affect road safety
Vital factor: ?
You are required to find the factor which is most crucial to the author's conclusion. The correct answer is a question which could support or weaken the conclusion depeneding on its answer.
The question in this answer choice is beside the point. Our task has nothing to do with solving the problem of road accidents. All we need to do is find a way of testing the author's conclusion.
B. Whether the companies that install the electronic signs have official government approval to do so
Incorrect.
This factor is irrelevant. The signs are already installed; considering how the government is dealing, or intends to deal, with the companies that install them will not help us find out whether the signs affect road safety.
C. Whether more than 50% of the collisions that take place at junctions are fatal
Incorrect.
This answer choice asks an unnecessary question. Road accidents are a problem even if only a few of them are fatal.
D. Whether the companies being advertised by the electronic signs report increases in the number of customers that approach them
Incorrect.
The efficiency of the signs has nothing to do with the author's conclusion and, therefore, cannot help us decide whether it's valid.
E. Whether the figures for accidents involving pedestrians are also the same for both types of junction
The argument refers to collisions between vehicles but not to accidents involving pedestrians. If the number of accidents involving pedestrians is the same for both types of junction, then the signs probably don't have any effect on road safety. If the pedestrian accidents numbers for the junctions with signs are much higher, then they do affect road safety, and the author is wrong.
General Discussion
Re: A recent report shows that the number of collisions between vehicles
[#permalink]
17 May 2021, 10:35
17 May 2021, 10:35
Top Contributor
A. Whether the current figures for road accidents can be reduced by improving certain conditions such as lighting
the use of another kind of signal is irrelevant. We want to know why those with ads and those without have no difference
B. Whether the companies that install the electronic signs have official government approval to do so
irrelevant
C. Whether more than 50% of the collisions that take place at junctions are fatal
irrelevant. we want to compare to way to avoid accidents NOT if they are fatal or not. This is another issue
D. Whether the companies being advertised by the electronic signs report increases in the number of customers that approach them
I do not know what that means but it implies nothing
E. Whether the figures for accidents involving pedestrians are also the same for both types of junction
This is good. Cars vs Pedestrians is a good way to evaluate if the signal work or not
E is the answer
Regards
the use of another kind of signal is irrelevant. We want to know why those with ads and those without have no difference
B. Whether the companies that install the electronic signs have official government approval to do so
irrelevant
C. Whether more than 50% of the collisions that take place at junctions are fatal
irrelevant. we want to compare to way to avoid accidents NOT if they are fatal or not. This is another issue
D. Whether the companies being advertised by the electronic signs report increases in the number of customers that approach them
I do not know what that means but it implies nothing
E. Whether the figures for accidents involving pedestrians are also the same for both types of junction
This is good. Cars vs Pedestrians is a good way to evaluate if the signal work or not
E is the answer
Regards
