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A pharmaceutical company tested a new painkiller on 1,000 lab rats tha

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A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 26 Feb 2017, 08:27
3
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A
B
C
D
E

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  55% (hard)

Question Stats:

58% (01:17) correct 42% (01:22) wrong based on 204 sessions

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Source: McGraw Hills GMAT

A pharmaceutical company tested a new painkiller on 1,000 lab rats that were fed large doses of the painkiller for a two-month period. By the end of the experiment, 39 of the rats had died. The company concluded that the painkiller was sufficiently safe to test on humans.

Which of the following, if true, provides the most support for the pharmaceutical company’s conclusion?

A. The amount of painkiller fed to the rats was substantially greater, in relation to body mass, than the dosage any human would take under normal circumstances.
B. Because of the different body chemistry of humans and rats, some compounds can be dangerous for rats but safe for humans, and vice versa.
C. Tests of this same painkiller on dogs showed that 3 out of 50 dogs developed lesions on their livers during the course of the experiment.
D. The researchers found that during the experiment, the rats showed a significantly lower sensitivity to pain than rats do under normal circumstances.
E. In an experiment of this length with this number of rats, it is not unusual for up to 50 rats to die during the experiment for reasons unrelated to the experiment itself.

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A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 27 Feb 2017, 12:53
Must be E
Assume that it is an analogy type of argument, so our goal is to find any evidence or assumption that would point out on any other reason due to rats have died during the experiment.
Ans "A" is tempting however we don't know if rats were fed with lower dosages of painkiller the upshot would be different or not, believe that it's the main drawback of this option.
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Re: A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 07 Mar 2017, 09:36
It is E.

Firstly, I have chosen A, but on the second try it is clearly E. "not unusual = usual"
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Re: A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 08 Mar 2017, 06:24
SajjadAhmad wrote:
Source: McGraw Hills GMAT

A pharmaceutical company tested a new painkiller on 1,000 lab rats that were fed large doses of the painkiller for a two-month period. By the end of the experiment, 39 of the rats had died. The company concluded that the painkiller was sufficiently safe to test on humans.

Which of the following, if true, provides the most support for the pharmaceutical company’s conclusion?

A. The amount of painkiller fed to the rats was substantially greater, in relation to body mass, than the dosage any human would take under normal circumstances.
B. Because of the different body chemistry of humans and rats, some compounds can be dangerous for rats but safe for humans, and vice versa.
C. Tests of this same painkiller on dogs showed that 3 out of 50 dogs developed lesions on their livers during the course of the experiment.
D. The researchers found that during the experiment, the rats showed a significantly lower sensitivity to pain than rats do under normal circumstances.
E. In an experiment of this length with this number of rats, it is not unusual for up to 50 rats to die during the experiment for reasons unrelated to the experiment itself.


Conclusion : very clearly
The company concluded that the painkiller was sufficiently safe to test on humans.

Premise : out of 1000 ,only 39 died.

in order for the conclusion to be true we must assume that 39 died due to reasons unrelated to the drug itself.
Only option E states that.
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A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 08 Mar 2017, 15:24
1
A pharmaceutical company tested a new painkiller on 1,000 lab rats that were fed large doses of the painkiller for a two-month period. By the end of the experiment, 39 of the rats had died. The company concluded that the painkiller was sufficiently safe to test on humans.

Which of the following, if true, provides the most support for the pharmaceutical company’s conclusion?

A. The amount of painkiller fed to the rats was substantially greater, in relation to body mass, than the dosage any human would take under normal circumstances.
B. Because of the different body chemistry of humans and rats, some compounds can be dangerous for rats but safe for humans, and vice versa.
C. Tests of this same painkiller on dogs showed that 3 out of 50 dogs developed lesions on their livers during the course of the experiment.
D. The researchers found that during the experiment, the rats showed a significantly lower sensitivity to pain than rats do under normal circumstances.
E. In an experiment of this length with this number of rats, it is not unusual for up to 50 rats to die during the experiment for reasons unrelated to the experiment itself.

PreThinking:For strengthen question we need to strengthen the link between the premise and the Conclusion, since the premise is that 39 rats died but even then the painkiller is safe for human testing.why is it safe one would think..it may be that the number of rats die during the tests is larger than in current scenario and the death rate is lower than usual.Or humans would be tested with significantly lower doses than rats.

Option E iterates the prethinking and is the correct answer.No need of POE.

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Re: A pharmaceutical company tested a new painkiller on 1,000 lab rats tha  [#permalink]

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New post 07 Apr 2017, 06:42
A is wrong because we have better option E , which clearly joins premise and conclusion. Option E mentions another factors to be the cause of death that is usual in such experiments whereas Option A talks about dosage amount , which doesn't justify the death of only 39 rats.
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Re: A pharmaceutical company tested a new painkiller on 1,000 lab rats tha &nbs [#permalink] 07 Apr 2017, 06:42
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