In 1987, an environmental action group reported a 65-percent : GMAT Critical Reasoning (CR)
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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]

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11 Sep 2005, 04:00
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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 groupâ€™s expectation is based on which of the following assumptions?

A. The groupâ€™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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11 Sep 2005, 06:06
Cearly, D is the assumption as it says that's the reason why they predict the same percentage of participation for the next survery.
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11 Sep 2005, 06:19
I see D to be the perfect fit because the passage states "On the basis of these results, the group expects a 65-to-70 percent response rate"
The rest are completely misleading as noted below.

rahulraao 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 groupâ€™s expectation is based on which of the following assumptions?

A. The groupâ€™s membership has not declined by more than 5 percent since 1987.

***The passage does not talk about declines.

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

***We donot know because the numbers may go up or down. Again the passage has no clue about this.

C. People who are concerned about ocean dumping are even more concerned about air pollution.

***I really liked this at the first instance. However, just an emotional liking but the passage does not mention this

D. The response rate of one questionnaire can be predicted from that of another.

*** Bull's eye

E. The total amount of pollution today is the same as it was in 1987.
***Completely irrelevant.

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11 Sep 2005, 13:58
D is perfect.
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hey ya......

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11 Sep 2005, 14:22
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11 Sep 2005, 20:51
D...This is another statistical analogy
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12 Sep 2005, 02:30
Evidence: In 1987, response rate was 65%.
Conclusion: Response rate will be just as good, if not 5% better.
Assumption: Which choice, if added to the paragraph, then taken away will cause the conclusion to fall apart?

A. The groupâ€™s membership has not declined by more than 5 percent since 1987.
- Actually, in order for the response rate to be 65-70%, the number of members will need to have increased, or a greater number of members will need to respond to the survey.

B. The same number of surveys will be distributed as were distributed in 1987.
- Just because the same number of surveys will be distributed doesn't mean that the same number will be returned.

C. People who are concerned about ocean dumping are even more concerned about air pollution.
- This is irrelevant to the argument

D. The response rate of one questionnaire can be predicted from that of another.
- The conclusion that the response rate is going to be 65-70% is based on the fact that the previous response rate was 65%. If this is not assumed, the environmental group would have no basis to predict the response rate for its upcoming questionaire.

E. The total amount of pollution today is the same as it was in 1987.
- Whether the amount of pollution increased or decreased has little or no effect on the number of survey responses.

I dunno, my guess is that it's <b>D</b>.
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Last edited by trulyblessed on 12 Sep 2005, 02:44, edited 1 time in total.
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12 Sep 2005, 02:41
OA is D guys! You've all done well!!
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12 Sep 2005, 02:41
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