Find all School-related info fast with the new School-Specific MBA Forum

It is currently 19 Aug 2014, 21:17

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

The number of people diagnosed with tuberculosis in a

  Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:
Intern
Intern
avatar
Joined: 09 May 2012
Posts: 16
Followers: 0

Kudos [?]: 1 [0], given: 7

The number of people diagnosed with tuberculosis in a [#permalink] New post 21 Feb 2013, 03:04
00:00
A
B
C
D
E

Difficulty:

(N/A)

Question Stats:

96% (01:54) correct 4% (00:00) wrong based on 62 sessions
The number of people diagnosed with tuberculosis in a certain city decreased significantly from one year to the next. Epidemiologists attributed this decline to the closing of a coal plant on the outskirts of the city; coal fumes have long been believed to cause acute lung inflammation that can lead to the contraction of tuberculosis.

Which of the following, if true, would most seriously weaken the epidemiologists' explanation for the decrease in tuberculosis diagnoses?

A. Due to a new medical technique introduced into the city this year, many people who would have been diagnosed with tuberculosis are now correctly diagnosed with emphysema.

B. The coal plant near the city closed, at least in part, because it was found to be polluting the air with particles that are dangerous when breathed.

C. Of those diagnosed with tuberculosis last year, a large number received immediate medical treatment that halted the progression of the disease.

D. Neighboring cities that are located farther from the closed coal plant did not observe decreases in tuberculosis diagnoses this year as compared to last year.

E. Although one large coal plant closed, there are still several smaller coal plants in operation within the borders of the city.

OA , after some discussion

Edit: by carcass
Senior Manager
Senior Manager
User avatar
Status: Final Lap
Joined: 25 Oct 2012
Posts: 292
Concentration: General Management, Entrepreneurship
Schools: Oxford
GPA: 3.54
WE: Project Management (Retail Banking)
Followers: 2

Kudos [?]: 95 [0], given: 85

Re: Decrease TB [#permalink] New post 21 Feb 2013, 03:37
GC14 wrote:
The number of people diagnosed with tuberculosis in a certain city decreased significantly from one
year to the next. Epidemiologists attributed this decline to the closing of a coal plant on the outskirts
of the city; coal fumes have long been believed to cause acute lung inflammation that can lead to the
contraction of tuberculosis. Which of the following, if true, would most seriously weaken the
epidemiologists' explanation for the decrease in tuberculosis diagnoses?
A. Due to a new medical technique introduced into the city this year, many people who would have been
diagnosed with tuberculosis are now correctly diagnosed with emphysema.
B. The coal plant near the city closed, at least in part, because it was found to be polluting the air with
particles that are dangerous when breathed.
C. Of those diagnosed with tuberculosis last year, a large number received immediate medical treatment
that halted the progression of the disease.
D. Neighboring cities that are located farther from the closed coal plant did not observe decreases in
tuberculosis diagnoses this year as compared to last year.
E. Although one large coal plant closed, there are still several smaller coal plants in operation within the
borders of the city.

OA , after some discussion


A- Incorrect, this option doesn't explain the significant decline from the previous one year to the next
B- Incorrect, this option strengthens the explanation given by the epidemiologists
C- Incorrect, we are concerned with the decline from the previous one year to the next not only the last year. This option could weaken the argument if the scope was only Last year.
D- Correct, if neighboring cities that are located farther from the closed coal plant did not observe decreases in turbeculosis diagnoses this year as compared to last year, hence the explanation given by the epidemiologists falls apart considering the fact that it's not the closing of the coal plant who is responsible of the decrease in contraction of the disease.
E- Incorrect, clearly OUT OF SCOPE
_________________

KUDOS is the good manner to help the entire community.

"If you don't change your life, your life will change you"

1 KUDOS received
Intern
Intern
User avatar
Joined: 29 Nov 2012
Posts: 6
WE: Consulting (Commercial Banking)
Followers: 0

Kudos [?]: 2 [1] , given: 13

Re: Decrease TB [#permalink] New post 21 Feb 2013, 05:05
1
This post received
KUDOS
IMO C is the correct answer !
It can be inferred from this statement that tuberculosis is contagious. So, the early treatment during the first year will reduce the contaminated population that might be diagnosed during the first or the next year.

D is incorrect : because we're talking about cities that are located farther from the closed plant --> we can't measure the effect of closing the plant. So this statement can't help us to undermind the epidemiologists' explanation.
_________________

"We must do that which we think we cannot."

Intern
Intern
avatar
Joined: 03 Apr 2012
Posts: 6
Followers: 0

Kudos [?]: 1 [0], given: 4

Re: Decrease TB [#permalink] New post 21 Feb 2013, 06:53
IMO A
A. Due to a new medical technique introduced into the city this year, many people who would have been
diagnosed with tuberculosis are now correctly diagnosed with emphysema.

This gives alternate reason for decrease in cases of TB. Due to incorrect diagnosis, the number of TB cases was high. But, now with new technique,many cases are correctly diagnosed.
Senior Manager
Senior Manager
User avatar
Status: Final Lap
Joined: 25 Oct 2012
Posts: 292
Concentration: General Management, Entrepreneurship
Schools: Oxford
GPA: 3.54
WE: Project Management (Retail Banking)
Followers: 2

Kudos [?]: 95 [0], given: 85

Re: Decrease TB [#permalink] New post 21 Feb 2013, 07:24
Hi Folks,

I think that both A and C are in the same case : if the argument stated that :
The number of people diagnosed with tuberculosis in a certain city decreased significantly from the last year to this year , then either A or C would be a strong contender.

For this reason, i think D is more appropriate when you look at the accumulated decline in the number of contractions.. :roll:
_________________

KUDOS is the good manner to help the entire community.

"If you don't change your life, your life will change you"

Expert Post
Moderator
Moderator
User avatar
Joined: 01 Sep 2010
Posts: 2364
Followers: 265

Kudos [?]: 2237 [0], given: 690

Re: The number of people diagnosed with tuberculosis in a certai [#permalink] New post 21 Feb 2013, 07:34
Expert's post
Intern
Intern
User avatar
Joined: 29 Nov 2012
Posts: 6
WE: Consulting (Commercial Banking)
Followers: 0

Kudos [?]: 2 [0], given: 13

Re: The number of people diagnosed with tuberculosis in a certai [#permalink] New post 21 Feb 2013, 07:47
Still not convinced by "D" :?
Please provide the OA
_________________

"We must do that which we think we cannot."

Senior Manager
Senior Manager
User avatar
Status: Final Lap
Joined: 25 Oct 2012
Posts: 292
Concentration: General Management, Entrepreneurship
Schools: Oxford
GPA: 3.54
WE: Project Management (Retail Banking)
Followers: 2

Kudos [?]: 95 [0], given: 85

Re: The number of people diagnosed with tuberculosis in a certai [#permalink] New post 21 Feb 2013, 07:59
it's really painful to wait for the OA when everyone seems attached to the choice he made especially when the source could be not official one ..

GC14 please add OA and source please
_________________

KUDOS is the good manner to help the entire community.

"If you don't change your life, your life will change you"

Expert Post
Moderator
Moderator
User avatar
Joined: 01 Sep 2010
Posts: 2364
Followers: 265

Kudos [?]: 2237 [0], given: 690

Re: The number of people diagnosed with tuberculosis in a certai [#permalink] New post 21 Feb 2013, 08:35
Expert's post
Intern
Intern
avatar
Joined: 15 Aug 2012
Posts: 47
Followers: 1

Kudos [?]: 18 [0], given: 2

Re: The number of people diagnosed with tuberculosis in a certai [#permalink] New post 21 Feb 2013, 08:48
GC14 wrote:
The number of people diagnosed with tuberculosis in a certain city decreased significantly from one year to the next. Epidemiologists attributed this decline to the closing of a coal plant on the outskirts of the city; coal fumes have long been believed to cause acute lung inflammation that can lead to the contraction of tuberculosis.

Which of the following, if true, would most seriously weaken the epidemiologists' explanation for the decrease in tuberculosis diagnoses?

A. Due to a new medical technique introduced into the city this year, many people who would have been diagnosed with tuberculosis are now correctly diagnosed with emphysema.

B. The coal plant near the city closed, at least in part, because it was found to be polluting the air with particles that are dangerous when breathed.

C. Of those diagnosed with tuberculosis last year, a large number received immediate medical treatment that halted the progression of the disease.

D. Neighboring cities that are located farther from the closed coal plant did not observe decreases in tuberculosis diagnoses this year as compared to last year.

E. Although one large coal plant closed, there are still several smaller coal plants in operation within the borders of the city.

OA , after some discussion

Edit: by carcass


Epidemiologists conclusion is that the closing of the coal plant is responsible for significant reduction is the no of people diagnosed with tuberculosis.

Prethinking :- we have to find some other factor that is responsible for reduction

POE :-
Option A :- Correct, this option states that closing of coal factory has not reduced the number.
Option B :- The reason for the closing of coal factory is out of scope
Option C :- This option although provide reasons for reduction in no of persons diagnosed, does not weaken the conclusion. this option can be considered as an additional factor along with the closing of factory. Hence this is not the correct answer.
Option D :- talks about cities that are farther from factory, so out of scope
Option E :- talks about other smaller plants still in operation, so out of scope.

IMO :- A
1 KUDOS received
Senior Manager
Senior Manager
User avatar
Status: Final Lap
Joined: 25 Oct 2012
Posts: 292
Concentration: General Management, Entrepreneurship
Schools: Oxford
GPA: 3.54
WE: Project Management (Retail Banking)
Followers: 2

Kudos [?]: 95 [1] , given: 85

Re: The number of people diagnosed with tuberculosis in a [#permalink] New post 16 Mar 2013, 18:01
1
This post received
KUDOS
The OA is A
Found it in other thread.

Hope this helps !
_________________

KUDOS is the good manner to help the entire community.

"If you don't change your life, your life will change you"

Senior Manager
Senior Manager
avatar
Joined: 26 Jul 2010
Posts: 278
Location: European union
Followers: 1

Kudos [?]: 21 [0], given: 38

Re: The number of people diagnosed with tuberculosis in a [#permalink] New post 17 Mar 2013, 13:10
Why not E ??

zthere are other coal factories in town which means that coal factories themselves are not the cause od the desease...
GMAT Pill Representative
User avatar
Joined: 07 Nov 2012
Posts: 346
Schools: LBS '14 (A)
GMAT 1: 770 Q48 V48
Followers: 135

Kudos [?]: 174 [0], given: 4

Re: The number of people diagnosed with tuberculosis in a [#permalink] New post 18 Mar 2013, 00:16
Hi Ivan,

It's actually irrelevant about the other plants. Hence others saying it is 'out of scope'.

We're looking at cause and effect between the big plant and the TB. As the amount of coal power is going down (the answer does not say there were new power plants...), then if coal is a cause of TB, then TB should go down too, even if some other plants exist.

Answer A as others have pointed out provides much more compelling evidence.

James
_________________

Former GMAT Pill student, now on staff. Used GMATPILL OG 12 and nothing else: 770 (48,48) & 6.0



... and more

Expert Post
3 KUDOS received
Veritas Prep GMAT Instructor
User avatar
Joined: 16 Oct 2010
Posts: 4663
Location: Pune, India
Followers: 1069

Kudos [?]: 4770 [3] , given: 163

Re: The number of people diagnosed with tuberculosis in a [#permalink] New post 18 Mar 2013, 04:18
3
This post received
KUDOS
Expert's post
GC14 wrote:
The number of people diagnosed with tuberculosis in a certain city decreased significantly from one year to the next. Epidemiologists attributed this decline to the closing of a coal plant on the outskirts of the city; coal fumes have long been believed to cause acute lung inflammation that can lead to the contraction of tuberculosis.

Which of the following, if true, would most seriously weaken the epidemiologists' explanation for the decrease in tuberculosis diagnoses?

A. Due to a new medical technique introduced into the city this year, many people who would have been diagnosed with tuberculosis are now correctly diagnosed with emphysema.

B. The coal plant near the city closed, at least in part, because it was found to be polluting the air with particles that are dangerous when breathed.

C. Of those diagnosed with tuberculosis last year, a large number received immediate medical treatment that halted the progression of the disease.

D. Neighboring cities that are located farther from the closed coal plant did not observe decreases in tuberculosis diagnoses this year as compared to last year.

E. Although one large coal plant closed, there are still several smaller coal plants in operation within the borders of the city.

OA , after some discussion

Edit: by carcass


Since there was some confusion about the various options, let's discuss the question in detail.

Argument:
The number of people diagnosed with tuberculosis decreased significantly this year.
Epidemiologists attributed this decline to the closing of a coal plant on the outskirts of the city. - we need to weaken this
Coal fumes can cause acute lung inflammation that can lead to the contraction of tuberculosis.

We need to look for some other reason for the decline in the number of tuberculosis diagnoses or something that tells us why closing of the coal plant may not be responsible for the decrease.

A. Due to a new medical technique introduced into the city this year, many people who would have been diagnosed with tuberculosis are now correctly diagnosed with emphysema.
This could certainly be a reason for the decreased number of tuberculosis diagnoses. It says that the number of tuberculosis diagnoses in the previous year was exaggerated - in this year the people who had emphysema were correctly diagnosed and were not clubbed with people who had tuberculosis. This could be a reason (other than the closing of the coal plant) for the decline in the number of tuberculosis diagnoses.

B. The coal plant near the city closed, at least in part, because it was found to be polluting the air with particles that are dangerous when breathed.
We already know this from the premises. It just tells us why it was closed. It anything, it strengthens the epidemiologists' explanation for the decrease in tuberculosis diagnoses

C. Of those diagnosed with tuberculosis last year, a large number received immediate medical treatment that halted the progression of the disease.
The treatment of those diagnosed last year is out of scope here. We are looking at the number of people who got diagnosed this year.

D. Neighboring cities that are located farther from the closed coal plant did not observe decreases in tuberculosis diagnoses this year as compared to last year.
This option also strengthens the epidemiologists' explanation for the decrease in tuberculosis diagnoses a little. It explains that cities far from the coal plant have not experienced this decrease so it is more probable now that the closing of the coal plant has resulted in the decrease of the number of tuberculosis cases.

E. Although one large coal plant closed, there are still several smaller coal plants in operation within the borders of the city.
This is out of scope too. Even if there are other harmful agents, the closing down of one major harmful agent could certainly be responsible for the decrease in the number of cases.

Answer (A)
_________________

Karishma
Veritas Prep | GMAT Instructor
My Blog

Save $100 on Veritas Prep GMAT Courses And Admissions Consulting
Enroll now. Pay later. Take advantage of Veritas Prep's flexible payment plan options.

Veritas Prep Reviews

SVP
SVP
User avatar
Joined: 01 Oct 2013
Posts: 1631
Followers: 229

Kudos [?]: 50 [0], given: 0

Premium Member
Re: The number of people diagnosed with tuberculosis in a [#permalink] New post 14 Aug 2014, 02:49
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: The number of people diagnosed with tuberculosis in a   [#permalink] 14 Aug 2014, 02:49
    Similar topics Author Replies Last post
Similar
Topics:
4 Experts publish their posts in the topic The number of new cases of tuberculosis diagnosed in Country venmic 7 06 Aug 2012, 19:54
1 The number of people diagnosed as having a certain sarb 1 28 Jun 2012, 18:49
1 Experts publish their posts in the topic The number of new cases of tuberculosis diagnosed in Country vatsas 9 21 Sep 2011, 08:03
The number of people diagnosed as having a certain bacterial feruz77 2 20 Oct 2010, 00:59
Experts publish their posts in the topic The number of new cases of tuberculosis diagnosed in Country ldpedroso 45 07 Jun 2008, 12:23
Display posts from previous: Sort by

The number of people diagnosed with tuberculosis in a

  Question banks Downloads My Bookmarks Reviews Important topics  


GMAT Club MBA Forum Home| About| Privacy Policy| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

Powered by phpBB © phpBB Group and phpBB SEO

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.