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69) A recent study found that snoring, thought not common in

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69) A recent study found that snoring, thought not common in [#permalink] New post 22 Sep 2004, 10:21
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(69) A recent study found that snoring, thought not common in either group, is more common among smokers than among nonsmokers. On the basis of this evidence, the author hypothesized that smoking by itself can induce snoring.
which one if the following if true, casts the most doubt about the author's hypothesis?


(a) Stress induces both snoring and smoking in certain individuals.
(b) obesity induces many individuals to smoke.
(c) most snorers do not smoke
(d) most smokers do not snore
(e) both smoking and snoring cause throat problems.

Please post your reasoning

Dharmin
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Last edited by Dharmin on 23 Sep 2004, 05:51, edited 1 time in total.
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 [#permalink] New post 22 Sep 2004, 10:36
D for mee

All are out of scope except C and D

C says exactly the opposite implication of the one we need to blast the author's hypothese...
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 [#permalink] New post 22 Sep 2004, 10:38
I'll go with D.I'll explain if this is the right answer.

Quote:
(d) most smokers do not snore

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 [#permalink] New post 22 Sep 2004, 18:16
Smoking induce snoring --> Author's conclusion

In (D), we're told smokers do not snore. So if smokers do not snore, then smoking does not induce snoring.


However, I have some questions about this question itself.

1) What is an 'eight group'?
2) Why was the hypothesis smoking induce snoring when it clearly was usign the fact from the study which says 'nonsmokers snore the most'. Shouldn't the hypothesis be 'smoking does not induce snoring' ?
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 [#permalink] New post 23 Sep 2004, 06:36
ywilfred wrote:

However, I have some questions about this question itself.

1) What is an 'eight group'?
2) Why was the hypothesis smoking induce snoring when it clearly was usign the fact from the study which says 'nonsmokers snore the most'. Shouldn't the hypothesis be 'smoking does not induce snoring' ?


Sorry guys, there were two typing mistakes in the questions. Please read the stem again, i have amended the stem now. The inconvenience caused regretted.

Moreover, IMHO, the skirmish is between C and A only.

choice - "C" seems more compelling compare to its counter choice - D.
If most sonrers do not smoke, it clearly mean smoking does not induce snoring. E.g. take 100 men who snore if most of these snorers (say 80 men) do not smoke. It will easily weak the author's conclusion.

Can someone please refute choice - "A" ?

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 [#permalink] New post 23 Sep 2004, 08:05
crackgmat3 wrote:
Why not A ??


Buddy, please explain your answer :)

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Re: CR 69 [#permalink] New post 23 Sep 2004, 08:50
Dharmin wrote:
(69) A recent study found that snoring, thought not common in either group, is more common among smokers than among nonsmokers. On the basis of this evidence, the author hypothesized that smoking by itself can induce snoring.
which one if the following if true, casts the most doubt about the author's hypothesis?


(a) Stress induces both snoring and smoking in certain individuals.
(b) obesity induces many individuals to smoke.
(c) most snorers do not smoke
(d) most smokers do not snore
(e) both smoking and snoring cause throat problems.

Please post your reasoning

Dharmin



A is the answer according to me!

So it says SMOKING (BY ITSELF) -> causes-> Snoring
Now A says:
STRESS causes both SMOKING AND SNORING

So the cause and effect are negated.
B,E-> out of scope
so with C it says that most snorers do not smoke but here the argument is dealing with the fact that smoking by itself CAN induce snoring
with D again...same logic as C.

Hope this makes sense.
In general,

If A CAUSES B to weaken it...you can say:

B causes A
C causes A
or D causes both A & B
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 [#permalink] New post 23 Sep 2004, 10:16
Thanks amitbalan for nice explanation :)


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Re: CR 69 [#permalink] New post 23 Sep 2004, 23:54
amitbalan wrote:
Dharmin wrote:
(69) A recent study found that snoring, thought not common in either group, is more common among smokers than among nonsmokers. On the basis of this evidence, the author hypothesized that smoking by itself can induce snoring.
which one if the following if true, casts the most doubt about the author's hypothesis?


(a) Stress induces both snoring and smoking in certain individuals.
(b) obesity induces many individuals to smoke.
(c) most snorers do not smoke
(d) most smokers do not snore
(e) both smoking and snoring cause throat problems.

Please post your reasoning

Dharmin



A is the answer according to me!

So it says SMOKING (BY ITSELF) -> causes-> Snoring
Now A says:
STRESS causes both SMOKING AND SNORING

So the cause and effect are negated.
B,E-> out of scope
so with C it says that most snorers do not smoke but here the argument is dealing with the fact that smoking by itself CAN induce snoring
with D again...same logic as C.

Hope this makes sense.
In general,

If A CAUSES B to weaken it...you can say:

B causes A
C causes A
or D causes both A & B


Yes, it might be true. But A says 'for certain individuals'. We can't make a conclusion based on facts that affects only some people.
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 [#permalink] New post 24 Sep 2004, 08:26
Yes friends, The OA to this question is - A

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  [#permalink] 24 Sep 2004, 08:26
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69) A recent study found that snoring, thought not common in

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