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# In tests for pironoma, a serious disease, a false positive

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Manager
Joined: 03 Jan 2008
Posts: 106
In tests for pironoma, a serious disease, a false positive [#permalink]

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02 Apr 2008, 14:54
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In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in
fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To
detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of
false positive results.
Which of the following, if true, gives the most support to the recommendation above?
(A) The accepted treatment for pironoma does not have damaging side effects.
(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side
effects as do the other laboratory tests used to detect pironoma.
(C) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of
delay can result in loss of life.
(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma.
(E) All laboratory tests to detect pironoma have the same proportion of false negative results.
Senior Manager
Joined: 29 Jan 2007
Posts: 441
Location: Earth
Re: CR-test for pironama [#permalink]

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02 Apr 2008, 16:35
I will go with E here....as its test with lowest positive thats obvious choice if all tests have same proportion of false negative
Not sure it is this easy though. Perhaps missing something.
Senior Manager
Joined: 07 Feb 2008
Posts: 311
Re: CR-test for pironama [#permalink]

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02 Apr 2008, 17:18
notahug wrote:
In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in
fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To
detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of
false positive results.
Which of the following, if true, gives the most support to the recommendation above?
(A) The accepted treatment for pironoma does not have damaging side effects.
(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side
effects as do the other laboratory tests used to detect pironoma.
(C) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of
delay can result in loss of life.
(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma.
(E) All laboratory tests to detect pironoma have the same proportion of false negative results.

I will go for B because since the laboratory test that has the lowest proportion of false positive results causes the same minor side effects as other tests use to detect pironoma, it can be inferred that it will be equally as effective.
Senior Manager
Joined: 07 Feb 2008
Posts: 311
Re: CR-test for pironama [#permalink]

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02 Apr 2008, 17:23
On second thoughts E makes more sense
Manager
Joined: 03 Jan 2008
Posts: 106
Re: CR-test for pironama [#permalink]

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02 Apr 2008, 18:47
kyatin wrote:
I will go with E here....as its test with lowest positive thats obvious choice if all tests have same proportion of false negative
Not sure it is this easy though. Perhaps missing something.

OA is E. But its not easy for me I chose B at the first time
Senior Manager
Joined: 29 Jan 2007
Posts: 441
Location: Earth
Re: CR-test for pironama [#permalink]

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02 Apr 2008, 20:58
Well B does not indicate why lowest false positive should be preferred if it has same side effect as others....why not select one with lowest false negative then.

IMO, thats why one can eliminate B.
Re: CR-test for pironama   [#permalink] 02 Apr 2008, 20:58
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# In tests for pironoma, a serious disease, a false positive

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