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# Y has been believed to cause Z. A new report, noting that Y

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Manager
Joined: 22 Jun 2008
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Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 11:30
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Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

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Manager
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17 Aug 2009, 10:53
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apramanik wrote:
Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

Do Not Give Ans Without Explanation.

The answer is A. The news reports claim X as cause for Z , but the belief is Y is the cause to Z. A suggests that X occurs followed by Z and Y doesnt occur at all which clearly supports the argument that X can be the root cause of Z instead of the belief that Y is.

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Director
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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 13:13
lordw wrote:
Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

I would go w/ A.

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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 13:20
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lordw wrote:
Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z. -> says in the absense of Y Z occurs
(B) In cases where X occurs, followed by Y, Y is usually followed by Z. ->weakens
(C) In cases where Y occurs but X does not, Y is usually followed by Z. -> this opposes the suggestion
(D) In cases where Y occurs but Z does not, Y is usually preceded by X. -> thsi is irrelevant
(E) In cases where Z occurs, it is usually preceded by X and Y. -> does not say Y does not cause Z

To prove : X not Y causes Z

hence (A) is apt for this proof
_________________

cheers
Its Now Or Never

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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 15:51
A pour moi

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Manager
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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 15:59
IMO A

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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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04 Aug 2008, 21:53
lordw wrote:
Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

IMO A)

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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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05 Aug 2008, 01:32
we need to prove the situation where X occurs but not Y, followed by Z. Hence A will be correct choice

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Director
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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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05 Aug 2008, 08:03
IMO A

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Y has been believed to cause Z. A new report, noting that Y [#permalink]

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17 Aug 2009, 09:21
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Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

Do Not Give Ans Without Explanation.

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Senior Manager
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17 Aug 2009, 16:18
Answer looks A to me as well

A- In cases where X occurs but Y does not, X is usually followed by Z
X is occuring and Y is not ,i.e. X-> Z
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17 Aug 2009, 16:55
A, best supports the hypothesis, because if y doesn't happen but Z is preceded by X, then suggest that X might caused Z instead of Y

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Senior Manager
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18 Aug 2009, 05:22
A for me too. agree with the above explanations.. post the OA

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18 May 2011, 02:00
A is the strongest
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18 May 2011, 11:30
A.
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Manager
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09 Jun 2011, 04:39
Clearly A

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Y has been believed to cause Z. A new report, noting that Y [#permalink]

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07 Sep 2012, 13:10
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Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

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Manager
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Re: Y has been believed to cause Z. A new report, noting [#permalink]

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07 Sep 2012, 14:38
A it is.

1)Y has been believed to cause Z (Y -> Z)
2)A new report, noting that Y and Z are often observed to be preceded by X; ( X -> [Z,Y])
3.)Conclusion :suggests that X, not Y, may be the cause of Z. (X -> Z)
To support new suggestion, Z must be preceded by X.

(A) In cases where X occurs but Y does not, X is usually followed by Z. ( X-> Z); this is true since Y=null
(B) In cases where X occurs, followed by Y, Y is usually followed by Z. (X->Y->Z this violates point 3.
(C) In cases where Y occurs but X does not, Y is usually followed by Z. (Y->Z) this does not strenthen conclusion coz x is missing.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.(z is missing)
(E) In cases where Z occurs, it is usually preceded by X and Y. (X,Y -> Z) it is reversed and is incorrect.
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If my post was worth it, then i deserve kudos

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Re: Y has been believed to cause Z. A new report, noting [#permalink]

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08 Sep 2012, 04:20
conty911 wrote:
A it is.

1)Y has been believed to cause Z (Y -> Z)
2)A new report, noting that Y and Z are often observed to be preceded by X; ( X -> [Z,Y])
3.)Conclusion :suggests that X, not Y, may be the cause of Z. (X -> Z)
To support new suggestion, Z must be preceded by X.

(A) In cases where X occurs but Y does not, X is usually followed by Z. ( X-> Z); this is true since Y=null
(B) In cases where X occurs, followed by Y, Y is usually followed by Z. (X->Y->Z this violates point 3.
(C) In cases where Y occurs but X does not, Y is usually followed by Z. (Y->Z) this does not strenthen conclusion coz x is missing.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.(z is missing)
(E) In cases where Z occurs, it is usually preceded by X and Y. (X,Y -> Z) it is reversed and is incorrect.

Thanks dear, I have read the question incompletely and based on that I have made my decision. But you explaination work for me.

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Re: Y has been believed to cause Z. A new report, noting that Y [#permalink]

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24 Oct 2013, 16:37
apramanik wrote:
Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.
Which of the following further observations would best support the new report’s suggestion?
(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

Do Not Give Ans Without Explanation.

OK, this one now.

Y has been believed to cause Z. A new report, noting that Y and Z are often observed to be preceded by X, suggests that X, not Y, may be the cause of Z.

So we need to find the case where X ---> Z not Y.

(A) In cases where X occurs but Y does not, X is usually followed by Z.
(B) In cases where X occurs, followed by Y, Y is usually followed by Z.
(C) In cases where Y occurs but X does not, Y is usually followed by Z.
(D) In cases where Y occurs but Z does not, Y is usually preceded by X.
(E) In cases where Z occurs, it is usually preceded by X and Y.

A is what we are looking for.
Happy to discuss

Cheers!
J

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Re: Y has been believed to cause Z. A new report, noting that Y   [#permalink] 24 Oct 2013, 16:37

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