In prenatal testing for spina bifida, a life threatening disease, a false positive result indicates that an fetus has spina bifida when, in fact, it does not; a false negative result indicates that a fetus does not have spina bifida when, in fact, it does. To detect spina bifida 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. All laboratory tests to detect spina bifida have the same proportion of false negative results.
B. The laboratory test that has the lowest proportions of false positive results causes the same minor side effects as do the other laboratory tests used to detect spina bifida.
C. In treating spina bifida 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 spina bifida.
E. The accepted treatment for spina bifida does not have damaging side effects.
no clue..
Take GMAT team, kindly provide the solution
Dear GS,
Just wait, let see how others are going to react.
TakeGMAT Team
A
Everything else constant, A is better for testing false positive
A
If all the test have same propotion of false -ve results, the it is reasonable to conclude that doctors must consider results with lowest false +ve.
C. In treating spina bifida patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.
A. All laboratory tests to detect spina bifida have the same proportion of false negative results.
A
C. In treating spina bifida patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.
B.
Lowest proportion of false +ve tests indicate the disease.
A
C
Take GMAT team, Please provide the solution.
Thnx
A
Definitely A
A. All laboratory tests to detect spina bifida have the same proportion of false negative results.
REASON:
If all laboratory tests give the same proportion of false negative results, then the ones that give the lowest proportion of false positive results are indeed the more reliable ones.
REASON why it is NOT C:
Since it is essential to begin treatment as early as possible, physicians should use the laboratory test that have the lowest proportion of false NEGATIVE results (i.e. – indicates that a fetus does not have spina bifida when, in fact, it does).
Therefore, the argument does not hold true for false POSITIVE results as it will be contradictory
B
Here, the assumption is that the recommended laboratory test, which is in this case is the one with having lowest false positive results, has no more side effects than caused by the current tests. So, I presume
that the answer is B.
my answer is B.
What is the correct answer ?
I agree with AG… IMO B too.
B
Its a battle between A and B. IMO B is the winner as it takes off the unstated assumption of the causal argument.
Can we have the OA plz?
Take the GMAT, pls give the answer.
The Ans is surely option A
a false +ve and false -ve results indicates the error is reports.
An equal no. of false -ve results across all types of test indicates that one side (i.e. the negative side of +/-) is equal for all of the tests.
If any test which has the least false +ve proportion will give the least amount of errors in testing.
therefore A supports the recommendation
Take the GMAT, pls give the answer.
Answer please ……………………………….
Take the GMAT,
Would you be so kind enough to give the answer to this question.
Believe its E.
B is my bet
B)The laboratory test that has the lowest proportions of false positive results causes the same minor side effects as do the other laboratory tests used to detect spina bifida
Reason
=======
It encourages the use of laboratory test that provides the lowest proportions of false positive results.
GMAT Team pls provide with the answer
Hey Gmat team… you guys are getting too slow in providing with the answers… please expedite the process…. thanks
I say the answer is choice A
Think its E.
Answer is C
I will go for the option D
A
Other choices dont make much sense to me.
Take GMAT, your intervention required.
My Ans B,
Whats the OA.
Its B because , its the only option which says that there is a method to reduce the false diagnosis but with side effects similar to other tests. Hence, it supports the statement mentioned .
ans is A
The answer to this question is A.
I think the answer is A
Ans is D
Answer is C : Reason – Take no risk
Even if the disease is detected when not in fact present, the treatment can start (false positive)
Other way round – No treatment begins though there is disease present – result – late treatment – may be fatal (false negative)
thus, prefer false positive to be safe
sorry agree with A
C is wrong
Lets remove the option not correct
A: As physicians sud choose Lab test that has lowest propotion of false +ve results but in A it has same propotion of -ve results so does not support
B: it is not supporting bcoz the ans sud support lowest prportion of false +ve results but B is saying that it has some side effects which is against.
C: No clue about it in discussion
D: It is talking about inconclusive test and I dont think it supports
E: SUd be the right ans.
If the treatment has no ill-effects, the false positive test should ALWAYS be used.
Keep in mind the proportion is irrelevant, since if you have all the same proportion, and the treatment has sideffects if you don’t have spida bifida…why would you risk that if positive or negative? Side effects can sometimes be worse than the disease itself!
Also, you have to keep in mind, what BEST supports the conclusion.
GMAT team..please provide the answer
A
E is the answer.
Reasoning:
First we need to understand the conclusion. The conclusion here means that, the treatment would be accurate if the low false positive results are considered. That is false positive results are the only ones that are troubling the physicians. The strengthen their conclusion, we need to say show that, even the small portion of those false positive results donot subdue the physicians treatment. E rightly conveys that. According to the view stated in E, even though a treatment is given to those who are tested false positive, it would not be affecting them.
As per my calculation the naswer should be B
Official Ans:
The most accurate test for pironoma would be the one with the fewest false results. If all tests have the same proportion of false negatives, then the most accurate is the one that has the lowest proportion of false positives. Thus, (D) supports the recommendation and is the best answer. Choices that deal with the treatment for pironoma and are irrelevant to the accuracy of tests for pironoma. Option that deals with the side effects of tests for pironoma, and does not address their accuracy.
The best Answer choice is D.. all the rest is utterly ridiculous and makes no sense….
The answer is A.
Its quite simple.
B-> Does not say anything False Negative. A particular treatment can low false positive but very high false negatives.
C-> Actually does support more of False positives. It is better to detect early than not to. So detecting the disease even though it is not there might help in treating it.
D-> Does not support False positive nor false negative.
E-> Strongly support False Negative. Since the treatment does not have any damagind side effects, it is ok to have a high false negative. However it does not say anything about False Positive.
Which leaves us with Option A. Correct me if I am wrong.
B
A.
and my reasoning is, that there could be a test which is just always negative. This will have the lowest proportion of false positives (zero), but it will never actually detect the condition. Without A the conclusion is terrible.
Answer is A for sure
D
A, because the the physicians are concerned with accuracy
D
E
C
A
its B
Beacause it is the only statement suportting the argument.
Gmat Team,
Can u plz reveal the answer???
I think D
B…
B
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i am also thinking d is the answer but lot of members given diffrent answers could u plz tel me which is best