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IN 1987, an environmental action group reported a 65-percent

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IN 1987, an environmental action group reported a 65-percent [#permalink] New post 03 Aug 2008, 15:01
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IN 1987, an environmental action group reported a 65-percent response rate to a questionnaire sent to all of its members. The subject of the questionnaire was ocean dumping. On the basis of these results, the group expects a 65-to-70 percent response rate to its upcoming questionnaire on air pollution.

The environmental group's expectation is based on which of the following assumptions?

a. The group's membership has not declined by more than 5 % since 1987
b. The same number of surveys will be distributed as were distributed in 1987
c. People who are concenred about ocean dumping are even more concerned about air pollution
d. The response rate of one questionnaire can be predicted from that of another
e. The total amount of pollution today is the same as it was in 1987

Kindly answer with your reasonning. I do not agree with the answer given nor its explanation in the reference material I have.

Thanks.
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Re: CR [#permalink] New post 03 Aug 2008, 15:16
D

between c and d, everything else can be ruled out
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Re: CR [#permalink] New post 03 Aug 2008, 16:52
D. and the reasoning is the same as explained by Gmatnub.
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Re: CR [#permalink] New post 03 Aug 2008, 17:02
IN 1987, an environmental action group reported a 65-percent response rate to a questionnaire sent to all of its members. The subject of the questionnaire was ocean dumping. On the basis of these results, the group expects a 65-to-70 percent response rate to its upcoming questionnaire on air pollution.

The environmental group's expectation is based on which of the following assumptions?

a. The group's membership has not declined by more than 5 % since 1987
Out of scope. There is no mention about the decline or increase in the membership

b. The same number of surveys will be distributed as were distributed in 1987
Irrelevant

c. People who are concerned about ocean dumping are even more concerned about air pollution
OUT OF SCOPE - nobody is talking about the level of concerns.

d. The response rate of one questionnaire can be predicted from that of another
The assumption made here is "just because the 1987 response rate on Ocean dumping was 65%, the response rate will be similar to air pollution. - BEST ANSWER

e. The total amount of pollution today is the same as it was in 1987
Irrelevant (nobody is talking about the amount of pollution)
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Re: CR [#permalink] New post 03 Aug 2008, 22:22
My reasoning was, 65% response for ocean dumping.
65% - 70% for air pollution.

There should be some relationship between ocean dumping & air pollution. People who answer the quesstionnaire are concerned about ocean dumping if they are also concerned about air pollution then we can expect atleast 65% response. So I went for C.

I think I shouldnt have 'given-a-lot-of-thought' on the relationship between concern & answering the questionnaire.
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Re: CR [#permalink] New post 03 Aug 2008, 22:24
paddler123 wrote:
IN 1987, an environmental action group reported a 65-percent response rate to a questionnaire sent to all of its members. The subject of the questionnaire was ocean dumping. On the basis of these results, the group expects a 65-to-70 percent response rate to its upcoming questionnaire on air pollution.

The environmental group's expectation is based on which of the following assumptions?

a. The group's membership has not declined by more than 5 % since 1987
b. The same number of surveys will be distributed as were distributed in 1987
c. People who are concenred about ocean dumping are even more concerned about air pollution
d. The response rate of one questionnaire can be predicted from that of another
e. The total amount of pollution today is the same as it was in 1987

Kindly answer with your reasonning. I do not agree with the answer given nor its explanation in the reference material I have.

Thanks.


IMO C) ... it shows clearly that People who were concerned prev. about ocean dumping will be more concerned about air pollution and hence they expect increase in % from 65
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Re: CR [#permalink] New post 04 Aug 2008, 01:22
The answer is D.
The argument says only about the response rate but the author did not comment that people are concerned about the dumping. We cannot assume that the response rate reflects their concern. Hence C is ruled out.
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Re: CR [#permalink] New post 04 Aug 2008, 06:06
D
Re: CR   [#permalink] 04 Aug 2008, 06:06
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