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A dog enthusiast took home two puppies from the dog shelter. [#permalink]
 31 Aug 2009, 06:51
Question Stats:
30% (02:35) correct
69% (01:48) wrong based on 1 sessions
A dog enthusiast took home two puppies from the dog shelter. He fed one of the puppies super-premium canned dog food, while he fed the other a generic brand from the grocery store. The dog fed on the generic brand gained weight twice as fast as the dog fed the super-premium brand. Because of the difference in these results, the dog enthusiast concluded that the generic brand actually provided nutrition superior to that of the super-premium brand.
Each of the following, if true, would weaken the evidence for the dog enthusiast's conclusion except for which of the following?
A. A dog will sometimes gain more weight when eating inferior-quality food because he must eat more of it to obtain the nutrients he needs.
B. The dogs were of mixed breeds and appeared to be descended from dogs of different sizes.
C. Both dogs ate all the food given to them at each serving.
D. The dog enthusiast did not give the two dogs equal amounts of their respective foods.
E. The dog who received the super-premium dog food suffered from a digestive system disorder that hindered his groeth.
I'd like to see your approach, guys
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Re: A dog enthusiast [#permalink]
31 Aug 2009, 07:06
Is it (C)?
it seems very obvious.
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Re: A dog enthusiast [#permalink]
31 Aug 2009, 07:15
seongbae wrote: Is it (C)?
it seems very obvious. Yes, the OA is C. But in D no mention to what puppy enthusiat gave more food. If he gave more food to first (canned dog food), it would strenghen the conclusion, isn't it???
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Re: A dog enthusiast [#permalink]
31 Aug 2009, 07:47
Conclusion: the generic brand actually provided nutrition superior to that of the super-premium brand.
(D) The dog enthusiast did not give the two dogs equal amounts of their respective foods.
In order to properly compare two products, you have to use equal amounts. If the dog enthusiast gave more generic brand than super-premium brand, and that's the reason for one puppy gaining more weight than the other one, you cannot properly conclude that one brand is superior to another.
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Re: A dog enthusiast [#permalink]
31 Aug 2009, 09:24
Quote:
Yes, the OA is C.
But in D no mention to what puppy enthusiat gave more food.
If he gave more food to first (canned dog food), it would strenghen the conclusion, isn't it???
This is a good point! However, the reason D seems tempting here is because you're mistaking "weaken" for "disprove." The facts in D makes the author's comparison an invalid one--he did not give the two dogs equivalent amounts of food, so cannot logically draw a conclusion based on his findings. You are absolutely correct that it is still possible that he gave less generic food out, and the generic dog still got bigger. However, that possibility has become significantly more remote with the addition of the information found in D. And making the conclusion significantly more remote, even if it's still conceivable, is enough for the GMAT.
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Re: A dog enthusiast [#permalink]
01 Sep 2009, 04:38
KapTeacherEli wrote: Quote:
Yes, the OA is C.
But in D no mention to what puppy enthusiat gave more food.
If he gave more food to first (canned dog food), it would strenghen the conclusion, isn't it???
This is a good point! However, the reason D seems tempting here is because you're mistaking "weaken" for "disprove." The facts in D makes the author's comparison an invalid one--he did not give the two dogs equivalent amounts of food, so cannot logically draw a conclusion based on his findings. You are absolutely correct that it is still possible that he gave less generic food out, and the generic dog still got bigger. However, that possibility has become significantly more remote with the addition of the information found in D. And making the conclusion significantly more remote, even if it's still conceivable, is enough for the GMAT. Thanks!
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Re: A dog enthusiast [#permalink]
01 Sep 2009, 08:11
I agree. It's C.
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Re: A dog enthusiast took home two puppies from the dog shelter. [#permalink]
11 Apr 2012, 15:04
Phew, I thought strenghtening first, would have been a tough one.. 
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Re: A dog enthusiast took home two puppies from the dog shelter. [#permalink]
13 Apr 2012, 02:12
straight C ..........!!
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Re: A dog enthusiast took home two puppies from the dog shelter. [#permalink]
13 Apr 2012, 07:20
bsv180985 wrote: A dog enthusiast took home two puppies from the dog shelter. He fed one of the puppies super-premium canned dog food, while he fed the other a generic brand from the grocery store. The dog fed on the generic brand gained weight twice as fast as the dog fed the super-premium brand. Because of the difference in these results, the dog enthusiast concluded that the generic brand actually provided nutrition superior to that of the super-premium brand.
Each of the following, if true, would weaken the evidence for the dog enthusiast's conclusion except for which of the following?
A. A dog will sometimes gain more weight when eating inferior-quality food because he must eat more of it to obtain the nutrients he needs.
B. The dogs were of mixed breeds and appeared to be descended from dogs of different sizes.
C. Both dogs ate all the food given to them at each serving.
D. The dog enthusiast did not give the two dogs equal amounts of their respective foods.
E. The dog who received the super-premium dog food suffered from a digestive system disorder that hindered his groeth.
I'd like to see your approach, guys A: Weakens...weight is increased not because it got more nutrients, because it has to eat more... B: generally weakens..casts doubt on conclusion.. C: Fine...so what ...does not do anything to conclusion...t D: Weakens...because it casts doubt on conclusion E: Out of scope.. so i feel the answer should be either A or D... may be an expert can help us in understanding this question and let us know how to answer this...
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Re: A dog enthusiast took home two puppies from the dog shelter. [#permalink]
13 Apr 2012, 09:47
harshavmrg wrote: bsv180985 wrote: A dog enthusiast took home two puppies from the dog shelter. He fed one of the puppies super-premium canned dog food, while he fed the other a generic brand from the grocery store. The dog fed on the generic brand gained weight twice as fast as the dog fed the super-premium brand. Because of the difference in these results, the dog enthusiast concluded that the generic brand actually provided nutrition superior to that of the super-premium brand.
Each of the following, if true, would weaken the evidence for the dog enthusiast's conclusion except for which of the following?
A. A dog will sometimes gain more weight when eating inferior-quality food because he must eat more of it to obtain the nutrients he needs.
B. The dogs were of mixed breeds and appeared to be descended from dogs of different sizes.
C. Both dogs ate all the food given to them at each serving.
D. The dog enthusiast did not give the two dogs equal amounts of their respective foods.
E. The dog who received the super-premium dog food suffered from a digestive system disorder that hindered his groeth.
I'd like to see your approach, guys A: Weakens...weight is increased not because it got more nutrients, because it has to eat more... B: generally weakens..casts doubt on conclusion.. C: Fine...so what ...does not do anything to conclusion...t D: Weakens...because it casts doubt on conclusion E: Out of scope.. so i feel the answer should be either A or D... may be an expert can help us in understanding this question and let us know how to answer this... I guess you missed something on the question stem part: Each of the following, if true, would weaken the evidence for the dog enthusiast's conclusion except for which of the following? It asks which of the following doesnt weakens or is neutral to the argument. I guess you now have the answer...  Hope this helps..!!
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Re: A dog enthusiast took home two puppies from the dog shelter. [#permalink]
13 Apr 2012, 10:42
C for me too.rst weakens somehow the argument.
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Re: A dog enthusiast took home two puppies from the dog shelter.
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13 Apr 2012, 10:42
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