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# Toxicologist: A survey of oil-refinery workers who work with

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Director
Joined: 03 May 2007
Posts: 899
Schools: University of Chicago, Wharton School
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Kudos [?]: 34 [0], given: 6

Toxicologist: A survey of oil-refinery workers who work with [#permalink]  16 Aug 2007, 20:59
00:00

Difficulty:

5% (low)

Question Stats:

80% (02:17) correct 20% (01:06) wrong based on 5 sessions
Toxicologist: A survey of oil-refinery workers who work with MBTE, an ingredient currently used in some smog-reducing gasoline, found an alarming incidence of complaints about headaches, fatigue, and shortness of breath. Since gasoline containing MBTE will soon be widely used, we can expect an increased incidence of headaches, fatigue, and shortness of breath.

Each of the following, if true, strengthens the toxicologist’s argument EXCEPT:

(A) Most oil-refinery workers who do not work with MBTE do not have serious health problems involving headaches, fatigue, and shortness of breath.
(B) Headaches, fatigue, and shortness of breath are among the symptoms of several medical conditions that are potentially serious threats to public health.
(C) Since the time when gasoline containing MBTE was first introduced in a few metropolitan areas, those areas reported an increase in the number of complaints about headaches, fatigue, and shortness of breath.
(D) Regions in which only gasoline containing MBTE is used have a much greater incidence of headaches, fatigue, and shortness of breath than do similar regions in which only MBTE-free gasoline is used.
(E) The oil-refinery workers surveyed were carefully selected to be representative of the broader population in their medical histories prior to exposure to MBTE, as well as in other relevant respects.
Director
Joined: 11 Jun 2007
Posts: 933
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Kudos [?]: 30 [0], given: 0

Re: CR: MBTE [#permalink]  16 Aug 2007, 21:45
Fistail wrote:
Toxicologist: A survey of oil-refinery workers who work with MBTE, an ingredient currently used in some smog-reducing gasoline, found an alarming incidence of complaints about headaches, fatigue, and shortness of breath. Since gasoline containing MBTE will soon be widely used, we can expect an increased incidence of headaches, fatigue, and shortness of breath.

Each of the following, if true, strengthens the toxicologist’s argument EXCEPT:

(A) Most oil-refinery workers who do not work with MBTE do not have serious health problems involving headaches, fatigue, and shortness of breath.
(B) Headaches, fatigue, and shortness of breath are among the symptoms of several medical conditions that are potentially serious threats to public health.
(C) Since the time when gasoline containing MBTE was first introduced in a few metropolitan areas, those areas reported an increase in the number of complaints about headaches, fatigue, and shortness of breath.
(D) Regions in which only gasoline containing MBTE is used have a much greater incidence of headaches, fatigue, and shortness of breath than do similar regions in which only MBTE-free gasoline is used.
(E) The oil-refinery workers surveyed were carefully selected to be representative of the broader population in their medical histories prior to exposure to MBTE, as well as in other relevant respects.

conclusion: MBTE will soon be widely used, we can expect an increased incidence of headaches, fatigue, and shortness of breath.

I was down to A & B since C, D, E strengthens the argument
This is a tricky one but going with B since it seems to be out of scope and will not help strengthen the conclusion.
Manager
Joined: 22 May 2006
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[#permalink]  16 Aug 2007, 23:12
Everything else other than B strengthens the argument. B is neutral. It doesn't give us any more information. It just says that these symptoms are potentially serious for health. The stem doesn't talk about general health at all.
VP
Joined: 09 Jul 2007
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Location: London
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[#permalink]  17 Aug 2007, 02:35
Straight B. It gives general info. and out of scope.

All others, if used, would strengthen the argument.
Director
Joined: 29 Aug 2005
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Kudos [?]: 124 [0], given: 7

Re: CR: MBTE [#permalink]  17 Aug 2007, 02:42
Should be B.

Stem:
-A survey of oil-refinery workers who work with MBTE found complaints about headaches, fatigue, and shortness of breath.
-Since gasoline containing MBTE will soon be widely used;
-Conclusion: We can expect an increased incidence of headaches, fatigue, and shortness of breath.

Each of the following, if true, strengthens the toxicologist’s argument EXCEPT:

(A) Most oil-refinery workers who do not work with MBTE do not have serious health problems involving headaches, fatigue, and shortness of breath.
(B) Headaches, fatigue, and shortness of breath are among the symptoms of several medical conditions that are potentially serious threats to public health.
this one is generally talking about "several medical conditions" that are not necessarily related to MBTE. Has no impact on the argument
(C) Since the time when gasoline containing MBTE was first introduced in a few metropolitan areas, those areas reported an increase in the number of complaints about headaches, fatigue, and shortness of breath.
(D) Regions in which only gasoline containing MBTE is used have a much greater incidence of headaches, fatigue, and shortness of breath than do similar regions in which only MBTE-free gasoline is used.
(E) The oil-refinery workers surveyed were carefully selected to be representative of the broader population in their medical histories prior to exposure to MBTE, as well as in other relevant respects.
Director
Joined: 03 May 2007
Posts: 899
Schools: University of Chicago, Wharton School
Followers: 5

Kudos [?]: 34 [0], given: 6

Re: CR: MBTE [#permalink]  17 Aug 2007, 05:59
thanks guys OA is B.

Its not difficult but i like this question.
Manager
Joined: 21 Aug 2006
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Location: Singapore
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[#permalink]  17 Aug 2007, 06:22
It is a straight B...........
Director
Joined: 12 Jul 2007
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[#permalink]  17 Aug 2007, 07:21
B for being neither here nor there!
[#permalink] 17 Aug 2007, 07:21
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# Toxicologist: A survey of oil-refinery workers who work with

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