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The Z-300 is a particularly fast new sports car, popular among young

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The Z-300 is a particularly fast new sports car, popular among young [#permalink]

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New post 11 Aug 2015, 03:21
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  55% (hard)

Question Stats:

61% (01:40) correct 39% (01:49) wrong based on 249 sessions

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The Z-300 is a particularly fast new sports car, popular among young drivers. It is an expensive model, and relatively few are on the roads. Two months ago, seven different young people in Catoville were arrested for operating the Z-300 at excessive speeds on local roads while having a blood alcohol level well above the legal limit. Since then, a police watch group has reported that Catoville traffic cops frequently have been pulling over drivers of the Z-300 and testing them for alcohol: the total number of Z-300 drivers stopped and tested is five times greater than the total number of drivers of all other makes or models stopped and tested.

Which of following conclusions can most properly be drawn from the information above?

A) Drivers of the Z-300 exceed local speed limits by much higher margins than that by which they exceed highway speed limits.
B) Some drivers of the Z-300 are unfairly subjected to delays.
C) The Catoville traffic cops have provided an effective deterrent to drunk driving within Catoville.
D) Drivers of fast sports cars are more likely to drive under the influence of alcohol than drivers of any other make or model of car.
E) In the past month, the rate of arrests for drunk driving are much higher for drivers of the Z-300 than it is for drivers of any other make or model of car.
[Reveal] Spoiler: OA

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The Z-300 is a particularly fast new sports car, popular among young [#permalink]

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I don't normally have issues with Magoosh questions, but I did have one with this question. Answer B can't be a conclusion; it's an assumption at best. These relative terms being thrown around here just don't cut it. How much are a "few" new model cars? How do we know if it didn't just happen that all the drivers pulled over were fairly subjected to delays because all of them just happened to be speeding?

Answer B is the BEST answer, but this shouldn't be an inference question. Too many assumptions here to arrive at B as an absolute conclusion.

Can a Magoosh representative respond to this one?

Edit: Thought about this question some more, and E would seem like a better answer by a huge margin. If we can make B to be the correct answer through a huge assumption (that just because extra cars were pulled over doesn't mean all were speeding), then E would be an even stronger answer for the following reason. Statistically, if all sports cars drivers are equally likely of having a drunk driver, if 5x more cars of this model are tested, then YES, E would be correct.

Anyone see where I am going with this?

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Re: The Z-300 is a particularly fast new sports car, popular among young [#permalink]

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BicepBrachii wrote:
I don't normally have issues with Magoosh questions, but I did have one with this question. Answer B can't be a conclusion; it's an assumption at best. These relative terms being thrown around here just don't cut it. How much are a "few" new model cars? How do we know if it didn't just happen that all the drivers pulled over were fairly subjected to delays because all of them just happened to be speeding?

Answer B is the BEST answer, but this shouldn't be an inference question. Too many assumptions here to arrive at B as an absolute conclusion.

Can a Magoosh representative respond to this one?

Edit: Thought about this question some more, and E would seem like a better answer by a huge margin. If we can make B to be the correct answer through a huge assumption (that just because extra cars were pulled over doesn't mean all were speeding), then E would be an even stronger answer for the following reason. Statistically, if all sports cars drivers are equally likely of having a drunk driver, if 5x more cars of this model are tested, then YES, E would be correct.

Anyone see where I am going with this?


Hello BicepBrachii
Really good points: I think a lot before found my answer to you )

The argument says nothing about speeding of the latter group: "cops frequently have been pulling over drivers of the Z-300 and testing them for alcohol" so we can not assume reason of stopping. And even if we assume this fact then we talk about all cars becasue B says only about some cars. So if 1 car was stopped not for speeding and checking for aclohol - this is case of unfair delay and B is true.

Let's check scenario if all were stopped for speeding:
All these drivers stopped for speeding but if all these cars stopped for speeding then why police do not write out a penalty for speeding and let them go? Why they start alcohol test in all cases? I do not know about USA but I think that this unusual procedure. So all these drivers subject to unfair delays in the form of alcohol checking.

About E I think that can not apply statistic and say that all cars equally likely of having a drunk driver. Maybe there is truck drivers who love to drink beer during their journeys. Also if drivers Z-300 see that their cars always check then they have incentive not to drink.
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The Z-300 is a particularly fast new sports car, popular among young [#permalink]

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New post 21 Aug 2015, 09:40
Hi Harley, thanks for the reply. I see where you're going with this and I agree with the reasoning. B is correct if even just one person were pulled over "unfairly" because they weren't drunk driving or speeding.

However, we can't conclude this for sure. This argument can't be tagged as a conclusion because it doesn't flow directly from the premises. Just because a bunch of Z-300 cars relative to other sports car models were pulled over, doesn't mean that not all of them were deserving of it.

I now agree that B is the best answer. However, I just don't think the question should have been asking for a conclusion, since you can't conclude that some cars were pulled over "unfairly" based off the information presented.

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Re: The Z-300 is a particularly fast new sports car, popular among young [#permalink]

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Re: The Z-300 is a particularly fast new sports car, popular among young   [#permalink] 28 Sep 2017, 08:26
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