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A team of researchers from MIT studied the effects of

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Re: A team of researchers from the Massa­chusetts Institute of Technology  [#permalink]

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New post 14 Aug 2018, 20:44
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Can you please walk us through all the options? I'm not entirely convinced how A weakens. I chose B.
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Re: A team of researchers from the Massa­chusetts Institute of Technology  [#permalink]

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New post 15 Aug 2018, 00:04
sandman13 wrote:
Can you please walk us through all the options? I'm not entirely convinced how A weakens. I chose B.


I am no expert of CR, but let me attempt to explain this one.

A study was conducted, in which a batch of 40 mice was divided into yoghurt eating group and a control group(no yoghurt eating). Yoghurt eating participants fared better than their counterparts. Conclusion drawn : yoghurt (probiotics) is the cause for healthier and leaner mice(effect). Assumption : No other factor triggering the effect.


To weaken this assumption, we would bring in a factor that effectively explains the result of the study. Choice A says many mice from the control group died. If 50% of mice showed the sexual machismo, it would mean 5/10 mice from yoghurt eating group fared well. Whereas if say 2 mice died in the control group, out of 8 mice, 50% showed sexual machismo, it would still bring in a result of 4/10. Despite the same ratio of 50%, Yoghurt eating batch gives a better result. Hence A weakens.

Please kudos if that helped.
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Re: A team of researchers from the Massa­chusetts Institute of Technology  [#permalink]

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New post 03 Sep 2018, 05:23
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Don't agree with the OA, which is stated as A. The statement strengthens and not weakens the conclusion. C is closest to a statement that weakens it.

Could someone please clarify? Thanks!
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Re: A team of researchers from the Massa­chusetts Institute of Technology  [#permalink]

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New post 03 Sep 2018, 10:55
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Quote:
A team of researchers from the Massa­chusetts Institute of Technology studied the effects of yogurt on mating. The researchers took a group of 40 male mice and 40 female mice and either fed the animals a high-fat, low-fiber, low-nutrient diet meant to mimic junk food or fed them standard mouse meals. They then supple­mented half of each diet group with vanilla-flavored yogurt.In mating experiments, yogurt-eating males inseminated their partners faster and produced more offspring than control mice. Conversely, females that ate the yogurt diets gave birth to larger litters and weaned those pups with greater success. The researchers concluded that the probiotic microbes in the yogurt help to make the animals leaner and healthier, which indirectly improves sexual machismo.

Which of the following if true, would most weaken the conclusion reached by the researchers?


A. Many of the mice in the control group died soon after the experiment.

B. In another study, probiotic microbes were not found to produce any significant health benefits.

C. Yogurt is not the only food which contains a high concentration of probiotic microbes.

D. Mating advantage of the yogurt eating mice reduced in a few days after they stopped taking yogurt.

E. The female yogurt eating mice were healthier than their male counterparts.


Let me try
shelleyjohnsam
CONCLUSION: the probiotic microbes in the yogurt help to make the animals leaner and healthier, which indirectly improves sexual machismo.

We need to weaken the above conclusion .


Quote:
A. Many of the mice in the control group died soon after the experiment.

If many of the mice in the control group died after the experiment means how can we know that the probotic mcrobes in the yogurt help make the animals leaner and healthier, and how can we know that it improves sexual machismo without observing it for a while. so if they are dead the conclusion is weakened.keep it.
Quote:
B. In another study, probiotic microbes were not found to produce any significant health benefits.

we need to find the reasons to weaken it not to contradict the argument and we are talking about this study not other studies and its more like an evidence rather than a weakener.eliminate it.
Quote:
C. Yogurt is not the only food which contains a high concentration of probiotic microbes.

Irrelevant and not mentioned in the passage. eliminate it .
Quote:
D. Mating advantage of the yogurt eating mice reduced in a few days after they stopped taking yogurt.

strengthener. eliminate it
Quote:
E. The female yogurt eating mice were healthier than their male counterparts.

Irrelevant.eliminate it.

If are a conservative then you can eliminate 3 at first and then you can choose between the last two( A and B).
A is the winner here.

Thank you.
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Re: A team of researchers from the Massa­chusetts Institute of Technology &nbs [#permalink] 03 Sep 2018, 10:55

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