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# Several studies have shown that hospitals are not all

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SVP
Joined: 03 Feb 2003
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Several studies have shown that hospitals are not all [#permalink]

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12 Jul 2004, 03:56
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Several studies have shown that hospitals are not all equally successful: patients are much more likely to die in some of them than in others. Since the hospitals in the studies had approximately equal per-patient funding, differences in the quality of care provided by hospital staff are probably responsible for the differences in mor-tality rates.

Which one of the following, if true, casts the most doubt on the conclusion drawn above?

(A) The staff in some of the hospitals studied had earned more advanced degrees, on average, than the staff in the other hospitals.
(B) Patient populations vary substantially in average severity of illness from hospital to hospital.
(C) The average number of years that staff members stay on at a given job varies considerably from one hospital to another.
(D) Approximately the same surgical procedures were performed in each of the hospitals covered in the studies.
(E) Mortality rates for hospital patients do not vary considerably from one region of the country to anther.

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Director
Joined: 05 Jul 2004
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12 Jul 2004, 05:39
(B)
(B) will answer the question why at one place die more in number than other.

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Senior Manager
Joined: 22 Jun 2004
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12 Jul 2004, 07:11
I think it is B.
If the patient population varies substantially from hospital to hospital, the mortality rate also differs.

A - Does not lead to any conlcusion
C - Out of scope(job hops vs differences in the quality of care leading to mortality rates)
D - Out of scope (surgical procedures vs differences in the quality of care leading to mortality rates)
E - Out of scope. Argument never talks about 'region' based health care differences.

stolyar wrote:
Several studies have shown that hospitals are not all equally successful: patients are much more likely to die in some of them than in others. Since the hospitals in the studies had approximately equal per-patient funding, differences in the quality of care provided by hospital staff are probably responsible for the differences in mor-tality rates.

Which one of the following, if true, casts the most doubt on the conclusion drawn above?

(A) The staff in some of the hospitals studied had earned more advanced degrees, on average, than the staff in the other hospitals.
(B) Patient populations vary substantially in average severity of illness from hospital to hospital.
(C) The average number of years that staff members stay on at a given job varies considerably from one hospital to another.
(D) Approximately the same surgical procedures were performed in each of the hospitals covered in the studies.
(E) Mortality rates for hospital patients do not vary considerably from one region of the country to anther.

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Awaiting response,

Thnx & Rgds,
Chandra

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Manager
Joined: 02 Jun 2004
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12 Jul 2004, 07:20
Stem: more patients die in some hospitals vs others

Given: equal patient funding for all hospitals

Conclusion: quality of care provided by staff is the variable

To weaken conclusion: there must be another cause [variable] to explain the discrepancy

B - it's reasonable to assume that the severity of illness can play a significant role in determining mortality

A - strengthens the argument, if staff in some of the hospitals are better-educated, they provide better care - exactly the opposite of what we need

C - same as A, strengthens the argument, although more indirectly, suggesting that a high staff turnover in some hospitals can account for worse care in some hospitals, which leads to higher mortality

D - merely gives us another given, like 'the same funding per patient in the surveyed hospitals'

E - that's really out of scope, we're concerned only with the hospitals which were surveyed
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SVP
Joined: 16 Oct 2003
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12 Jul 2004, 07:29
B.

The funding per patient is the same and we cannot comment on the the quality of care. so it has to be something else. What if the patients which come in some of the hospitals are more severe than the others. B fits well

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GMAT Club Legend
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13 Jul 2004, 07:08
Funny, I kind of figured out the answer before reading any of the choices. I've been living too much on GMAT mode lately
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Best Regards,

Paul

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13 Jul 2004, 07:08
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# Several studies have shown that hospitals are not all

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