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According to Dr. Sean, people who consume broccoli everyday are half a

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Joined: 12 Dec 2016
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According to Dr. Sean, people who consume broccoli everyday are half a  [#permalink]

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01 Mar 2018, 10:05
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According to Dr. Sean, people who consume broccoli everyday are half as likely to be diagnosed with heart diseases as compared to others. Dr. Sean stated this after he had monitored diet of 100 patients for 12 months.

Which of the following options weakens the argument stated above?

A According to a famous Science Journal, broccoli has no relation with heart diseases at all.

B People who were monitored during this study belonged to the same town.

C Everyone whose diet was being monitored was supposed to spend 30 minutes each day jogging.

D There are different kinds of broccoli available in the market these days, some of which are artificially manufactured.

E Dr. Sean doesn’t hold a degree from one of the lesser known universities.

test.guide
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Joined: 31 May 2017
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Re: According to Dr. Sean, people who consume broccoli everyday are half a  [#permalink]

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01 Mar 2018, 11:09
Option B, D and E are out of scope and does not weaken the statement.

We are left with A and C

A - brocoli has no relation to heart disease.
This statement contradicts the Dr.Sean’s theory, but this was a statement from journal and has no relationship to the research and also we do not know the time of publication related to the research.

C - Everyone supposed to go jogging for 30 mins daily, now this says there is another reason for people to have lessen the risk of heart disease

Ans :C

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Re: According to Dr. Sean, people who consume broccoli everyday are half a  [#permalink]

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05 Aug 2019, 10:28
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one confusion here. Does the 100 people constitute just the test portion or it has the combination of test and control group. If first is the case, then yes C is the clear winner, but if 2nd is true, then C fails, as both test and control were supposed to jog.
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Re: According to Dr. Sean, people who consume broccoli everyday are half a  [#permalink]

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05 Aug 2019, 11:53
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This question makes no sense. As saury2k points out, the question doesn't even make clear if the 100 people were all eating broccoli, and their heart disease rate was compared with the general population, or if only some of the 100 people were eating broccoli, and those people were compared with the rest of the 100 who did not eat broccoli. If we don't even know how the study was conducted, how can we know how to weaken its conclusion?

Answer C is only potentially right if everyone was eating broccoli. Then the fact that those people also jogged might make them different from average people in another respect besides broccoli-eating, and the jogging might account for their lower incidence of heart disease. But you'd need to know two things the question doesn't tell us: does jogging reduce heart disease, and is 30 minutes of jogging an above or below average amount of jogging? Without that information, there's no way to tell if C weakens the argument. And if C is right because all 100 people were eating broccoli, then B is right too. If these people are all from the same town, there are dozens of reasons (cleaner drinking water, genetic commonalities, etc, etc) that these people might be at lower risk of heart disease than are average people. It's a biased sample, and you can't generalize from a biased sample.

There's no value in studying questions like this.
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Re: According to Dr. Sean, people who consume broccoli everyday are half a   [#permalink] 05 Aug 2019, 11:53