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The rate at which psychiatrists in different regions

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The rate at which psychiatrists in different regions [#permalink] New post 06 Sep 2010, 23:13
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53% (02:40) correct 47% (01:34) wrong based on 215 sessions
The rate at which psychiatrists in different regions administer many prescription drugs shows massive variation — up to a fifty-fold dissimilarity per million patients in the numbers of antidepressant, anti-bipolar, and anti-psychotic medications prescribed.

To support a conclusion that much of the variation is due to unnecessary prescription of drugs, it would be necessary to establish which of the following?

A: Every psychiatrist is supervised by a regional review board, which checks the record of every patient to confirm that the prescription drug was necessary.

B: The dissimilarity is unrelated to regional factors (other than the prescription drugs themselves) that influence the incidence of diseases for which prescription drugs might be considered.

C: There are several classes of prescription drugs (other than antidepressant, anti-bipolar, and anti-psychotic ones) that are often administered unnecessarily.

D: For certain prescription drugs, it is difficult to determine after the treatment whether the drug was necessary or whether an alternative treatment would have been effective.

E: The prescribing of antidepressant, anti-bipolar, and anti-psychotic drugs is representative of prescription drugs generally with respect to how often they are prescribed unnecessarily.
[Reveal] Spoiler: OA

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Re: psychiatrists in different regions administer prescription [#permalink] New post 07 Sep 2010, 00:36
Nice one pretty tough.
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Re: The rate at which psychiatrists in different regions [#permalink] New post 10 Jul 2012, 07:32
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Straight B.

If the variation is due to regional difference, the notion that there is actual unnecessary prescription is weakened.

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Re: The rate at which psychiatrists in different regions [#permalink] New post 10 Jul 2012, 07:59
My Understanding...

All choices other than B either weaken the conclusion or are Out of Scope

By eliminating Regional factor as the cause for Variation (as mentioned in the argument), it strengthens ‘unnecessary prescription of drugs’ as cause for variations
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Re: The rate at which psychiatrists in different regions [#permalink] New post 11 Feb 2014, 11:58
gmatbull wrote:
The rate at which psychiatrists in different regions administer many prescription drugs shows massive variation — up to a fifty-fold dissimilarity per million patients in the numbers of antidepressant, anti-bipolar, and anti-psychotic medications prescribed.

To support a conclusion that much of the variation is due to unnecessary prescription of drugs, it would be necessary to establish which of the following?

A: Every psychiatrist is supervised by a regional review board, which checks the record of every patient to confirm that the prescription drug was necessary.

B: The dissimilarity is unrelated to regional factors (other than the prescription drugs themselves) that influence the incidence of diseases for which prescription drugs might be considered.

C: There are several classes of prescription drugs (other than antidepressant, anti-bipolar, and anti-psychotic ones) that are often administered unnecessarily.

D: For certain prescription drugs, it is difficult to determine after the treatment whether the drug was necessary or whether an alternative treatment would have been effective.

E: The prescribing of antidepressant, anti-bipolar, and anti-psychotic drugs is representative of prescription drugs generally with respect to how often they are prescribed unnecessarily.


Between A and B here. But went with A cause it sounded more straightforward. Will anybody dare to share direct comparison between those two answer choices?

Thanks!
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J
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Re: The rate at which psychiatrists in different regions [#permalink] New post 11 Feb 2014, 18:24
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jlgdr wrote:

Between A and B here. But went with A cause it sounded more straightforward. Will anybody dare to share direct comparison between those two answer choices?

Thanks!
Cheers
J


The best way to look at this question is to find the Assumption because all of the answer choices are potential assumptions. If you find the real Assumption (and then establish it at a premise) the conclusion is supported. A good strategy for finding an assumption when you have two good candidates is to negate the assumption (create a negative version) and see what happens to the conclusion. A true assumption, when negated, will attack the conclusion.

Negated A
NOT every psychiatrist is supervised by a regional review board, which checks the record of every patient to confirm that the prescription drug was necessary.

Negated B
The dissimilarity is unrelated RELATED to regional factors (other than the prescription drugs themselves) that influence the incidence of diseases for which prescription drugs might be considered.

Negated A doesn't impact the conclusion. Negated B, by saying that dissimilarity is related to regional factors, directly attacks the conclusion that the dissimilarity is due to unnecessary prescriptions. Because Negated B attacks the conclusion, Option B is the true assumption that, when established, would strengthen the conclusion.

KW
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Re: The rate at which psychiatrists in different regions [#permalink] New post 12 Feb 2014, 09:12
gmatbull wrote:
The rate at which psychiatrists in different regions administer many prescription drugs shows massive variation — up to a fifty-fold dissimilarity per million patients in the numbers of antidepressant, anti-bipolar, and anti-psychotic medications prescribed.

To support a conclusion that much of the variation is due to unnecessary prescription of drugs, it would be necessary to establish which of the following?

A: Every psychiatrist is supervised by a regional review board, which checks the record of every patient to confirm that the prescription drug was necessary.

B: The dissimilarity is unrelated to regional factors (other than the prescription drugs themselves) that influence the incidence of diseases for which prescription drugs might be considered.

C: There are several classes of prescription drugs (other than antidepressant, anti-bipolar, and anti-psychotic ones) that are often administered unnecessarily.

D: For certain prescription drugs, it is difficult to determine after the treatment whether the drug was necessary or whether an alternative treatment would have been effective.

E: The prescribing of antidepressant, anti-bipolar, and anti-psychotic drugs is representative of prescription drugs generally with respect to how often they are prescribed unnecessarily.


TO SUPPORT THE conclusion that much of the variation is due to unnecessary prescription of drugs, WE WOULD LIKE TO ESTABLISH THAT THERE WERE NO OTHER REASON FOR VARIATION IN QUANTITY OF PRESCRIPTION OTHER THAN UNNECESSARY PRESCRIPTION.....B CORRECTLY RULES OUT REGIONAL FACTORS.....
Re: The rate at which psychiatrists in different regions   [#permalink] 12 Feb 2014, 09:12
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The rate at which psychiatrists in different regions

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