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Left-handed persons suffer more frequently than do right-handed person

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Left-handed persons suffer more frequently than do right-handed person  [#permalink]

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New post Updated on: 09 Oct 2018, 04:00
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62% (02:13) correct 38% (02:18) wrong based on 781 sessions

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Left-handed persons suffer more frequently than do right-handed persons from certain immune disorders, such as allergies. Left-handers tend to have an advantage over the right-handed majority, however, on tasks controlled by the right hemisphere of the brain, and mathematical reasoning is strongly under the influence of the right hemisphere in most people.

If the information above is true, it best supports which of the following hypotheses?


(A) Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed.

(B) Most left-handed mathematicians suffer from some kind of allergy.

(C) There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability.

(D) If a left-handed person suffers from an allergy, that person will probably be good at mathematics.

(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good.

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Originally posted by SudiptoGmat on 27 Jan 2010, 17:47.
Last edited by Bunuel on 09 Oct 2018, 04:00, edited 1 time in total.
Renamed the topic and edited the question.
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Re: Left-handed persons suffer more frequently than do right-handed person  [#permalink]

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New post 11 Aug 2012, 07:36
5
The key to this question is to not forget that the proportion between left-handers and right-handers is skewed. Therefore, just because lefties are more likely to have allergies then righties does not mean that if somebody has allergies he/she is more likely to be lefty. After all, if 90% of population is righty, then there are far more righties and we can't draw this conclusion. (C) takes this phenomenon into account. If lefties are stronger at math, then proportionally you will see more lefties in an above average math group than a below average group.
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Re: Left-handed persons suffer more frequently than do right-handed person  [#permalink]

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New post 27 May 2010, 11:58
1
Left-handed persons suffer more frequently than do right-handed persons from certain immune disorders, such as allergies. Left-handers tend to have an advantage over the right-handed majority, however, on tasks controlled by the right hemisphere of the brain, and mathematical reasoning is strongly under the influence of the right hemisphere in most people.

If the information above is true, it best supports which of the following hypotheses?

(A) Most people who suffer from allergies or other such immune disorders are left-handed rather than right-handed. - the argument more LH suffer from allery not that most people who suffer from allergies are LH. Argument If A then B and this option says If B then A. incorrect

(B) Most left-handed mathematicians suffer from some kind of allergy. - most LH suffer from allergies not most LH mathematicians suffer from allergies

(C) There are proportionally more left-handers among people whose ability to reason mathematically is above average than there are among people with poor mathematical reasoning ability. (correct) - argument says LH have advantage on tasks controlled by the right hemisphere of the brain, and mathematical reasoning is strongly under the influence of the right hemisphere.

(D) If a left-handed person suffers from an allergy, that person will probably be good at mathematics. - Argument says LH suffers frequently from allergies and LH have advantage on tasks controlled by right hemisphere...and so good in mathematics....that does not mean that if a LH has allergy, he is also good at mathematics.

(E) There are proportionally more people who suffer from immune disorders such as allergies than there are people who are left-handed or people whose mathematical reasoning ability is unusually good. - irrelevant
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Re: Left-handed persons suffer more frequently than do right-handed person  [#permalink]

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New post 04 Jan 2011, 14:38
C is the answer.

(A) Most people who suffer from allergies or other
such immune disorders are left-handed rather
than right-handed.
More frequently not most people. OUT
(B) Most left-handed mathematicians suffer from
some kind of allergy.
mathematicians out of scope.
(C) There are proportionally more left-handers among
people whose ability to reason mathematically
is above average than there are among people
with poor mathematical reasoning ability.
if left handers have a better control over the right hemisphere and this leads to the strong mathematical reasoning,then the proportion of the left-handed should be greater.
(D) If a left-handed person suffers from an allergy,
that person will probably be good at mathemat-
ics.
Definite statement.OUT
(E) There are proportionally more people who suffer
from immune disorders such as allergies than
there are people who are left-handed or people
whose mathematical reasoning ability is
unusually good.
We don't know from the stem that there proportionally more people who suffer
from immune disorders such as allergies.OUT
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Re: Left-handed persons suffer more frequently than do right-handed person  [#permalink]

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New post 09 Oct 2018, 04:00
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Re: Left-handed persons suffer more frequently than do right-handed person   [#permalink] 09 Oct 2018, 04:00
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