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Exposure to certain chemicals commonly used in elementary

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Exposure to certain chemicals commonly used in elementary [#permalink] New post 21 Sep 2004, 03:02
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Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.
B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago
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Re: CR: elementary schools [#permalink] New post 21 Sep 2004, 03:56
marine wrote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children. Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years. Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years.
B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances.
C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago.
D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston.
Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago.
E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years ago


My pick is "E" on this. If children attending elementary school make up larger part of its population the conclusion will tear off.
"D" comes pretty close but "Renston’s schoolchildren have been exposed to greater quantities of the chemicals" takes care of it.
:btw whats the OA ?

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 [#permalink] New post 21 Sep 2004, 05:45
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C it is
If children are more likely to be sent off to nurses, how can we say that it is because they are more likely to be allergic? Only the sending to nurses frequency has increased. Nothing has changed in children themselves.

E) we are only interested in the nurse-patient relationship which happens in the school, what happens in the general population is out of scope
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 [#permalink] New post 21 Sep 2004, 06:27
Paul wrote:
C it is
If children are more likely to be sent off to nurses, how can we say that it is because they are more likely to be allergic? Only the sending to nurses frequency has increased. Nothing has changed in children themselves.

E) we are only interested in the nurse-patient relationship which happens in the school, what happens in the general population is out of scope


:yes true paul, thanks a ton for posting explanation

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 [#permalink] New post 23 Sep 2004, 17:59
Dharmin wrote:
Paul wrote:
C it is
If children are more likely to be sent off to nurses, how can we say that it is because they are more likely to be allergic? Only the sending to nurses frequency has increased. Nothing has changed in children themselves.

E) we are only interested in the nurse-patient relationship which happens in the school, what happens in the general population is out of scope


:yes true paul, thanks a ton for posting explanation

Dharmin


OA is C
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Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 04 Feb 2014, 03:18
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Re: Exposure to certain chemicals commonly used in elementary [#permalink] New post 04 Feb 2014, 06:31
premise 1------Exposure to certain chemicals commonly used in elementary schools as cleaners or pesticides causes allergic reactions in some children.

premise 2-----Elementary school nurses in Renston report that the proportion of schoolchildren sent to them for treatment of allergic reactions to those chemicals has increased significantly over the past ten years.

conclusion------ Therefore, either Renston’s schoolchildren have been exposed to greater quantities of the chemicals, or they are more sensitive to them than schoolchildren were ten years ago.

THE ESSENCE OF THE CONCLUSION IS THAT----EITHER MORE EXPOSURE OR SENSITIVITY CAUSE MORE STUDENTS REPORTING TO NURSES....
IT ASSUMES THAT THERE IS NO OTHER CAUSE FOR MORE REPORTING. ONE ASSUMPTION COULD BE-----IT IS NOT THAT GENERALLY MORE STUDENTS TEND TO REPORT NOW THAN BEFORE..........RATHER exposure to greater quantities of the chemicals or more sensitivity to them led to more reporting....

Which of the following is an assumption on which the argument depends?

A. The number of school nurses employed by Renston’s elementary schools has not decreased over the past ten years. does not affect more reporting....
B. Children who are allergic to the chemicals are no more likely than other children to have allergies to other substances. having allergy is not the issue... reporting is..also other substance allergy is not the issue here.
C. Children who have allergic reactions to the chemicals are not more likely to be sent to a school nurse now than they were ten years ago. correct ... as per our derivation
D. The chemicals are not commonly used as cleaners or pesticides in houses and apartment buildings in Renston......even if we know that the chemicals that caused the allergy are the ones in school only, and not at homes, we dont know why the numbers increased... more exposure or other reason....
E. Children attending elementary school do not make up a larger proportion of Renston’s population now than they did ten years agostudent population irrelevant... how many affected by the chemical is



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Re: Exposure to certain chemicals commonly used in elementary   [#permalink] 04 Feb 2014, 06:31
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