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Re: A physically active lifestyle has been shown to help increase longevit [#permalink]
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jabhatta2 wrote:

I don't think your video analysis addressed any of my points, unfortunately, jabhatta2.
To answer a couple of the questions you pose in your video:
1) Yes, I think of the life spans as bell curves.
2) The migrants to Wistar, by your framing, die at age 80, not 70. The information we have about Wistar is not just about the locals (born and raised in Wistar), but about all people dying in Wistar (average age at death).
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Re: A physically active lifestyle has been shown to help increase longevit [#permalink]
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jabhatta2 wrote:
The argument is all about comparing two fundamentally different groups

Group A - not forced to live physically active lifestyles
Group B - forced to live physically active lifestyle.

If old people (from Group A) immigrate to WISTAR, they should still die at 70 years old

Just to wrap this conversation up, jabhatta2:
1) the argument is not all about comparing groups A and B above. Rather, the argument is about a possible explanation for this surprising phenomenon: In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country.
2) Old people from other parts of the country have a much higher average age at death compared to the average age at death of the general population in those other parts of the country. This is because of survivorship bias.
3) The influx of these migrants, whose average age at death is particularly high, may explain the surprising phenomenon, thereby calling into question the explanation put forth by the argument.
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Re: A physically active lifestyle has been shown to help increase longevit [#permalink]
kinjiGC wrote:
Vercules wrote:
A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrain makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active lifestyle on people. Clearly, this circumstance explains the long lives of people in Wistar.

Which of the following, if true, most seriously weakens the argument?

A) In Bellaria all medical expenses are paid by the government, so that personal income does not affect the quality of health care a person receives.
B) The Wistar region is one of Bellaria, s least populated regions.
C) Many people who live in the Wistar region have moved there in middle age or upon retirement.
D) The many opportunities for hiking, skiing, and other outdoor activities that Wistar's mountains offer make it a favorite destination for vacationing Bellarians.
E) Per capita spending on recreational activities is no higher in Wistar than it is in other regions of Bellaria.


Premise: Physical activity increases longevity and as Wister has higher average age at death > then rest of Bellaria, hence people do physical activity and that explains their longevity.

A) In Bellaria all medical expenses are paid by the government, so that personal income does not affect the quality of health care a person receives.
No distinction made between Bellaria and Wister -> Incorrect

B) The Wistar region is one of Bellaria is least populated regions.
This doesn't explain why there is higher than average age at death -> Incorrect

C) Many people who live in the Wistar region have moved there in middle age or upon retirement.
So most of the people are already higher than average age when they moved to Wister and that provides an alternate explanation -> Correct

D) The many opportunities for hiking, skiing, and other outdoor activities that Wistar's mountains offer make it a favorite destination for vacationing Bellarians.
Out of scope -> Incorrect

E) Per capita spending on recreational activities is no higher in Wistar than it is in other regions of Bellaria.
There is no indication as to why residents of Wister have higher than average age at death -> Incorrect


Why is option B here wrong? Is my reasoning correct? Since average= total age of all people/total no of people,if total no of people is less i.e. your denominator decreases average age increases, it is strengthening the evidence of conclusion. Is this correct way to look at optionB?
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Re: A physically active lifestyle has been shown to help increase longevit [#permalink]
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