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

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Director
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In 1987, an environmental action group reported a 65-percent [#permalink]

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New post 19 Sep 2004, 13:31
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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 percent since 1987.

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

C. People who are concerned 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.

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Re: CR Environmental survey [#permalink]

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New post 19 Sep 2004, 14:09
venksune 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 percent since 1987.

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

C. People who are concerned 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.



I would go with D. If you Negate this statement, I feel the whole argument falls apart....

But...this is a tough one...B was close...but then if you negate that the above argument could still hold...because of other reasons.
But if you negate D that you cannot predict one questionaire from the results of another...then i think the argument would fall apart.
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New post 19 Sep 2004, 16:13
C it is. less 1 min
B talks about percentages and no matter how many surveys are distributed, all we need to know is that 65-70 percent will be answered.

We need to assume that interest in 2 issues is same to assume same response rate
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New post 19 Sep 2004, 19:32
A. The group’s membership has not declined by more than 5 percent since 1987.
Even if it declined, a percentage could still be achieved based on new membership headcounts. A is out.

B. The same number of surveys will be distributed as were distributed in 1987.
This only ensures that a more accurate conclusion can be made from the questionnaire, nothing else. B is out.

C. People who are concerned about ocean dumping are even more concerned about air pollution.
C is good. If more people are concerned, they would be enthusiastic in responding to the questionnaire and at least 65% (the same figure as ocean dumping) should respond

D. The response rate of one questionnaire can be predicted from that of another.
D is even better. This tells us that if the response rate for the questionnaire involving ocean dumping is 65%, then we can at least expect the same rate for the next questionnaire (on air pollution)

E. The total amount of pollution today is the same as it was in 1987.
Out of scope. E is out.

Between C and D, I'll go with D.

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New post 20 Sep 2004, 21:39
I choose C too. But the OA is D. D says that early response is the basis for them to predict the current response - and makes sense.

C is intriguing, but since air pollution can be taken as a more important one than ocean dumping - by default, D seem to make more sense.

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New post 22 Sep 2004, 11:58
I too picked C. :cry:
Well, the explanation for D is also convincing.
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  [#permalink] 22 Sep 2004, 11:58
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In 1987, an environmental action group reported a 65-percent

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