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Medical researcher: Scientists compared a large group of joggers who

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Medical researcher: Scientists compared a large group of joggers who [#permalink]

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New post 24 Aug 2017, 10:43
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Medical researcher: Scientists compared a large group of joggers who habitually stretch before jogging to an equal number of joggers who do not stretch before jogging. Both groups of joggers incurred roughly the same number of injuries. This indicates that stretching before jogging does not help to prevent injuries.

Which one of the following, if true, would most weaken the medical researcher’s argument?

(A) For both groups of joggers compared by the scientists, the rate of jogging injuries during the study was lower than the overall rate of jogging injuries.
(B) Among the joggers in the groups compared by the scientists, many of those previously injured while jogging experienced difficulty in their efforts to perform stretches.
(C) Most jogging injuries result from falls, collisions, and other mishaps on which the flexibility resulting from stretching would have little if any effect.
(D) The more prone a jogger is to jogging injuries, the more likely he or she is to develop the habit of performing stretches before jogging.
(E) Studies have found that, for certain forms of exercise, stretching beforehand can reduce the severity of injuries resulting from that exercise.

Source:LSAT
[Reveal] Spoiler: OA

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Re: Medical researcher: Scientists compared a large group of joggers who [#permalink]

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New post 24 Aug 2017, 11:43
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Let's name the groups - Group A(Stretchers) and Group B(Non-Strechers).

Only (D) weakens the arguement.

This option clearly states that people who are more prone to injuries develop a habit of stretching. So Group A, the members of which were more likely to suffer injuries actually suffered the same number number of injuries compared to that of Group B, who don't stretch because they are not as prone to injuries as the members of Group A.
This clearly means that members of Group A actually saved themselves from atleast some injuries.

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Re: Medical researcher: Scientists compared a large group of joggers who   [#permalink] 24 Aug 2017, 11:43
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