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Q13) Strengthen Questions Toxicologist: A survey of

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Q13) Strengthen Questions Toxicologist: A survey of [#permalink] New post 17 Apr 2010, 01:32
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A
B
C
D
E

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  5% (low)

Question Stats:

59% (02:05) correct 40% (01:13) wrong based on 22 sessions
Q13)Strengthen Questions

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
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Re: Toxicologist [#permalink] New post 17 Apr 2010, 03:14
13. B

This option says what could be implications of Headaches, fatigue, and shortness of breath. It does not say anything about how incidences would increase, while the rest options do.
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Re: Toxicologist [#permalink] New post 17 Apr 2010, 03:34
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It's a weaken question rather than strengthen :) i will pick option B too though the wordings are not quite precise as expected.

Toxicologist's argument
MBTE -----> increased incidence of headaches, fatigue and shortness of breath

what can weaken this

- if the cause of headaches, fatigue and shortness of breath is attributed to something else other than MBTE

what's the OA
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Re: Toxicologist [#permalink] New post 17 Apr 2010, 10:17
Yep OA is B
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Re: Toxicologist [#permalink] New post 19 Apr 2010, 11:49
B it is.
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Re: Toxicologist [#permalink] New post 23 Apr 2010, 11:38
RaviChandra wrote:
Yep OA is B


You have taken a very good initiative.
If possible could you please put spaces after stimulus, question stem and every answer choice. It will be easy to read.
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Re: Toxicologist [#permalink] New post 28 Apr 2010, 21:11
Quote:
Q13)Strengthen Questions

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


Since it is a Strengthen-X question. We should find a point which do not strengthen the stimuli.

B is the best possible answer
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Re: Toxicologist [#permalink] New post 12 May 2010, 02:46
I was thinking between B and E.
Personaly for me, they both do not strengthen the argument.
what is wrong with E?
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Re: Toxicologist [#permalink] New post 13 May 2010, 03:45
E provides the necessary condition for the survey`s conclusion.
Without this condition you could have some doubts regarding the group of people.
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Re: Toxicologist [#permalink] New post 15 May 2010, 06:24
could somebody explain what is the problem with E?
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Re: Toxicologist [#permalink] New post 19 Jun 2011, 23:22
If you read book CRITICAL REASONING BIBLE, you will see that the best part of the book is about causal relation and if you read this part, you see this question is too easy.
Re: Toxicologist   [#permalink] 19 Jun 2011, 23:22
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