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The average life expectancy for the United States population as a whol

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The average life expectancy for the United States population as a whol  [#permalink]

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New post Updated on: 25 Mar 2019, 02:11
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The average life expectancy for the United States population as a whole is 73.9 years, but children born in Hawaii will live an average of 77 years, and those born in Louisiana, 71.7years. If a newlywed couple from Louisiana were to begin their family in Hawaii, therefore, their children would be expected to live longer than would be the case if the family remained in Louisiana.

Which of the following statements, if true, would most significantly strengthen the conclusion drawn in the passage?

A. As population density increases in Hawaii, life expectancy figures for that state are likely to be revised downward.
B. Environmental factors tending to favor longevity are abundant in Hawaii and less numerous in Louisiana.
C. Twenty-five percent of all Louisianans who move to Hawaii live longer than 77 years.
D. Over the last decade, average life expectancy has risen at a higher rate for Louisianans than for Hawaiians.
E. Studies show that the average life expectancy for Hawaiians who move permanently to Louisiana is roughly equal to that of Hawaiians who remain in Hawaii


Please see this discussion for a similar question with the same Premise: https://gmatclub.com/forum/the-average- ... 07235.html

Project CR Butler:Day 25:Critical Reasoning (CR2)


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Originally posted by shyind on 05 Jun 2015, 05:44.
Last edited by Bunuel on 25 Mar 2019, 02:11, edited 5 times in total.
Renamed the topic and edited the question.
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Re: The average life expectancy for the United States population as a whol  [#permalink]

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New post 13 Dec 2018, 08:53
Quote:
The average life expectancy for the United States population as a whole is 73.9 years, but children born in Hawaii will live an average of 77 years, and those born in Louisiana, 71.7years. If a newlywed couple from Louisiana were to begin their family in Hawaii, therefore, their children would be expected to live longer than would be the case if the family remained in Louisiana.
Which of the following statements, if true, would most significantly strengthen the conclusion drawn in the passage?


Quote:
A. As population density increases in Hawaii, life expectancy figures for that state are likely to be revised downward.

We don't know for sure population density will increase in Hawaii?, even though if it (Population Density) increases, then also Life expectancy would likely decrease.We don't know will it(Life Expectancy for Hawaii) decrease to a value less than that of Louisiana? Hence, It does not impact the conclusion about the life expectancy of the child from Louisiana origin parents in Hawaii and Louisiana.

Quote:
B. Environmental factors tending to favor longevity are abundant in Hawaii and less numerous in Louisiana.


CORRECT, as it provides us a reason (feasible environment conditions) to reinforce our belief about the Higher Life Expectancy in Hawaii over that in Louisiana

Quote:
C. Twenty-five percent of all Louisianans who move to Hawaii live longer than 77 years.


Statistic provided is about 25% Louisianans, which is a minor portion of all Louisianans who move to Hawaii. Since we are not sure whether the child of Louisianans would fall in which of the two portions. Hence this statement(C) does not help us alter our belief about the conclusion.

Quote:
D. Over the last decade, average life expectancy has risen at a higher rate for Louisianans than for Hawaiians.

Trends from last decade about change in rates of avg life expectancy for Louisianans and Hawaiians are not sufficient to decide over the life expectancy of the child from Louisiana origin parents in Hawaii and Louisiana. because

firstly, trends could change and may or may not repeat itself further?
secondly, Life expectancy rate is a statistic existing because of underlying factors which may be environmental or genetic and (Life expectancy rate) cannot solely be used to prove a conclusion.


Quote:
E. Studies show that the average life expectancy for Hawaiians who move permanently to Louisiana is roughly equal to that of Hawaiians who remain in Hawaii


No impact, as the discussion in the above passage is about Louisianians (whether their Life expectancy will change) and not about Hawaiians.
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Re: The average life expectancy for the United States population as a whol   [#permalink] 13 Dec 2018, 08:53
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