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In 1987, an Enviormental Action Group reported a 65 percent

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In 1987, an Enviormental Action Group reported a 65 percent [#permalink] New post 11 Mar 2007, 18:53
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In 1987, an Enviormental Action Group reported a 65 percent response rate to a questionnaire sent to all of its members. The subject of the questinnaire was ocean dumping. On the basis of these results, the group expects a 65 t0 70 percent response rate to its upcoming questionnare on air pollution.

The enviormental group's expectation is based on wihic of the following assumptions?

A) The groups membership has not declined by more that 5% 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 the other.
E)The total amount of pollution today is the same as it was in 1987.
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 [#permalink] New post 11 Mar 2007, 19:01
C it is

65 percent response for ocean dumping.

expects a 65 to 70 percent response for air pollution.
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 [#permalink] New post 11 Mar 2007, 20:55
D

C is wrong because we cant conclude that the sample will be the same for the second questionaire.
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 [#permalink] New post 11 Mar 2007, 20:56
(C)

Both concerns are similar, so the responses should be.
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 [#permalink] New post 11 Mar 2007, 21:10
I will go for D as it says response rate The response rate of one questionnaire can be predicted from the other.

C may not be correct as it talks about people's concern, as the number of respondents may be more than the number of people concerned.


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 [#permalink] New post 11 Mar 2007, 21:31
Chose D. We have no information available which can support other options.
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[#permalink] New post 11 Mar 2007, 21:45
The Group can project the response rate for air pollution survey only if it assumes that result of a past survey can be extrapolated to calculate response rate for new surveys. All choices other than D are either outside scope of argument or supply redundant information

Hence D
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 [#permalink] New post 12 Mar 2007, 00:56
Give me D!

It doesn't matter if the people who are concerned about ocan dumping are even more concerned about air pollution. they still get only one questionnaire to respond to!
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 [#permalink] New post 12 Mar 2007, 15:13
OA is D.

I also choose C.

thanks for the insight guys!

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 [#permalink] New post 12 Mar 2007, 16:17
the concern of people in C doesn't necessarily mean they will be responding to the survey or even that set of people would be taken in for the survey.
  [#permalink] 12 Mar 2007, 16:17
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