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# Choi: All other factors being equal, children whose parents

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Manager
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Choi: All other factors being equal, children whose parents [#permalink]

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02 Sep 2005, 04:59
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Choi: All other factors being equal, children whose parents earned doctrates are more likely to earn a doctorate than children whose parents did not earn doctorates.

Hart: But consider this: Over 70% of all doctorate holders do not have a parent who also holds a doctorate.

Which of the following is the most accurate evaulation of Hart's reply?

A. It establishes Choi's claim is an exaggeration
B. If true, it effectively demonstrates that Choi's claim cannot be accurate
C. It is consistent with Choi's claim
D. It provides alternative reasons for accpeting Choi's claim.
E. It mistakes what is necessary for an event with what is suficient to determine that the event will occur.

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GMAT Club Legend
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02 Sep 2005, 05:10
E. It mistakes what is necessary for an event with what is suficient to determine that the event will occur.
- I'll take E. Hart mistakes what is nescessary for an event (children will get doctorate if parents hold doctorates) with what is sufficient to determine that the event will occur. Choi's statemetns merely show that sufficiency.

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Senior Manager
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02 Sep 2005, 05:40
I would go for C.

it says: Over 70% of all doctorate holders, which means that
30 percent have parents with a doctorate.
So if we had 10 doctorates, 3 would have had parents with a doctorate.

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02 Sep 2005, 05:41
E,

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02 Sep 2005, 05:42
I'll stick to E. Just like to experiment with this answer choice

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02 Sep 2005, 09:22
I would go with E here.

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Senior Manager
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Re: CR: Choi and Hart [#permalink]

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02 Sep 2005, 12:44
E

Hart uses a BUT, that indicates the answer is E, because probably a small proportion of people with doctorate produces 30% childern who earn doctorate, compared to the rest of the population that produces only the remaning 70%
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03 Sep 2005, 03:16
OA is C, macca got it spot on with the explanation, although I'm still baffled by it.

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03 Sep 2005, 04:47
Decibel wrote:
OA is C, macca got it spot on with the explanation, although I'm still baffled by it.

When somebody uses BUT to reply to a statement IMO it can only mean they are not consistent with what is said before...

Consider this:

Howdy: I am from Texas

Bubba: BUT, i thought you were from down south...

yes we all know the reply is consistent with Howdy, but it can also be infered that bubba does not know Texas is down south, so in his opinion he thought Howdy was form some other part of the world....

In the same note, in this question the replying guy fails to recognise the statistical profoundity of the statement and thinks what he says is inconsistent with what the first guy said....that is what the answer should be....
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03 Sep 2005, 10:26
ranga41 wrote:
Decibel wrote:
OA is C, macca got it spot on with the explanation, although I'm still baffled by it.

When somebody uses BUT to reply to a statement IMO it can only mean they are not consistent with what is said before...

Consider this:

Howdy: I am from Texas

Bubba: BUT, i thought you were from down south...

yes we all know the reply is consistent with Howdy, but it can also be infered that bubba does not know Texas is down south, so in his opinion he thought Howdy was form some other part of the world....

In the same note, in this question the replying guy fails to recognise the statistical profoundity of the statement and thinks what he says is inconsistent with what the first guy said....that is what the answer should be....

Yes, the 'but' does seem a little strange to put in a conversation when you're in agreement with someone else.

Its a little like:

Mangaer: You need to work harder
Me: But yes, I agree I need to work harder.

If you agree with the manager that you're slacking off a little, you wouldn't use 'but' would you?

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03 Sep 2005, 11:57
hi mecca,
i'm still not able to able to understand your logic..
fine that 3 out of 10 doctorates have their parents as doctorates...doesn't that mean 7 out of 10 docs have parents who are not doctorates..
doesnot that weaken choi's statement....
can some one explain this to me...i'm totally confused..

Krishna

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03 Sep 2005, 14:59
While I chose B at first...E is begining to make sense after reading explns....However, how would you parallel choice E with the stimulus:

E. It mistakes what is necessary for an event with what is suficient to determine that the event will occur.

necessary for an event vs. sufficent that the event will occur -> ? vs. ?

Anyone?
_________________

Thanks!

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Re: CR: Choi and Hart [#permalink]

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04 Sep 2005, 20:16

The quick explanation: P(A|B) is different from P(B|A)

Intuitive explanation:

7 doctorate holders do not have a parent who holds a doctorate
3 doctorate holders do have a parent who holds a doctorate

What if in the entire world, there are only 10 families in which a parent holds a doctorate, and 1000 families in which a parent does not hold a doctorate?

Then Choi's claim still holds true. 30% of the families with a parent holding a doctorate have a child holding a doctorate, and only 0.7% of families with a parent not having a doctorate have a child holding a doctorate

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Re: CR: Choi and Hart   [#permalink] 04 Sep 2005, 20:16
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