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A recent study compared data on the overall health and lifespans of

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A recent study compared data on the overall health and lifespans of [#permalink]

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A recent study compared data on the overall health and lifespans of people who abstain from drinking alcoholic beverages with those of people who drink moderately. Surprisingly, the results of the study showed that on average those who regularly drink moderate amounts of alcohol are in better health and live longer than those who abstain. Clearly, consuming alcohol in moderation is beneficial to health.

Which of the following, if true, most calls into question the validity of the above conclusion?

A. What constitutes consuming alcohol in moderation is not defined in exactly the same way by every researcher.

B. Many people who abstain from consuming alcohol do so because they are not healthy.

C. The alcohol content of different types of alcoholic beverages varies widely.

D. The people who consumed alcoholic beverages moderately did not do so in order to experience health benefits.

E. The study was designed so that the effects of other lifestyle related variables, such as diet, did not distort the results.


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[Reveal] Spoiler: OA

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Last edited by MartyMurray on 11 May 2017, 05:50, edited 1 time in total.

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Re: A recent study compared data on the overall health and lifespans of [#permalink]

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New post 10 May 2017, 23:06
Option B rightly calls into question the conclusion that "Clearly consuming alcohol in moderation is beneficial to health" it could be that people who have abstained from alcohol are not in good health. In such a case to suggest that consuming alcohol (in any quantity) would not be beneficial to their health.

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Re: A recent study compared data on the overall health and lifespans of [#permalink]

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New post 11 May 2017, 05:39
The argument says there is some relationship between Alcohol consumption and health of a person.

Moderate consumption means a better lifestyle than no consumption.

Conclusion: Let's cheers with some alcohol as it will make us healthy. :-D

We need to weaken this. Pre assumption: What if people who are drinking it are really healthy and they may stop drinking it because of their poor health.

A. Consuming alcohol in moderation is defined in different ways by different researchers. Irrelevant.

B. Many people who abstain from consuming alcohol do so because they are not healthy. ok, Had the conclusion be true, they should have taken more pegs.
But they are not doing so. Hence, a weakener.


C. The alcohol content of different types of alcoholic beverages varies widely. Irrelevant.

D. The people who consumed alcoholic beverages moderately did not do so in order to experience health benefits. May be there are not aware. They are doing with their friends.

E. The study was designed so that the effects of other lifestyle related variables, such as diet, did not distort the results.: Irrelevant.
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Re: A recent study compared data on the overall health and lifespans of [#permalink]

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New post 22 Nov 2017, 17:19
Using POE, I can eliminate other option choices than B.
B is a pattern in which the sample is biased, so the conclusion is not valid.
I do not know why people skip this question, but the question looks like a gmat question.

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Re: A recent study compared data on the overall health and lifespans of   [#permalink] 22 Nov 2017, 17:19
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