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In the summer of 1936 a polling service telephoned 10,000

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In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post Updated on: 03 Oct 2017, 22:13
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A
B
C
D
E

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  15% (low)

Question Stats:

76% (01:35) correct 24% (01:55) wrong based on 253 sessions

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In the summer of 1936 a polling service telephoned 10,000 United States voters and asked how they planned to vote in the coming presidential election. The survey sample included a variety of respondents—rural and urban, male and female, from every state. The poll predicted that Alfred Landon would soundly defeat Franklin Roosevelt. Nevertheless, Roosevelt won in a landslide.

Which one of the following, if true, best explains why the poll’s prediction was inaccurate?

(A) The interviewers did not reveal their own political affiliation to the respondents.

(B) Only people who would be qualified to vote by election time were interviewed, so the survey sample was not representative of the overall United States population.

(C) The survey sample was representative only of people who could afford telephones at a time when phone ownership was less common than it is today.

(D) No effort was made to determine the respondents’ political affiliations.

(E) Because the poll asked only for respondents’ candidate preference, it collected no information concerning their reasons for favoring Landon or Roosevelt.

Source: LSAT

Originally posted by rohitgoel15 on 24 Jul 2010, 02:09.
Last edited by broall on 03 Oct 2017, 22:13, edited 1 time in total.
Reformatted question
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 24 Jul 2010, 02:53
(B) Only people who would be qualified to vote by election time were interviewed, so the survey sample was not representative of the overall United States population.
It makes a bit of sense, but not strongly clear enough to explain the shocking result of the election.

(C) totally explains it, since the fewer people with telephones at home, the less accuate the telephone survey will be.
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 28 Jul 2010, 05:30
The argument is least bothered about overall United States Population. The Argument has explicitly talked about United States voters. As maintained by the argument it is clear that United States Voters are NOT an accurate reflection of the the GENERAL POPULATION. Therefore no need to assume something that is long way away.
B can be ruled out in view of the reason that the information in B is beyond the facts stated on the argument.

C is precise
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 28 Jul 2010, 08:10
+1 for C.. Believe it was a straight-forward one.
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 28 Jul 2010, 08:51
If as B says only those people who were eligible to vote were interviewed - the survey was in fact representative of the population. B just stitches two contradistinct scenarios - if eligible voters alone were interviewed - how can the sample not be representative? You don't want to count the opinion of those who would not have been eligible to vote in the first place So B does not explain the discrepancy.
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 28 Jul 2010, 21:09
dwivedys wrote:
If as B says only those people who were eligible to vote were interviewed - the survey was in fact representative of the population. B just stitches two contradistinct scenarios - if eligible voters alone were interviewed - how can the sample not be representative? You don't want to count the opinion of those who would not have been eligible to vote in the first place So B does not explain the discrepancy.


Exactly my explanation

C rules
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 29 Jul 2010, 07:16
agree with Dwivdeys explanation.
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 06 Aug 2015, 19:34
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Request you not to write your queries/answers/opinions in question window. It prevents ppl from analysing the question. The whole purpose of GMAT Club forum goes wasted by doing so.
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Re: In the summer of 1936 a polling service telephoned 10,000  [#permalink]

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New post 12 Jul 2019, 09:18
In this question, we're looking for a discrepancy between the predicted outcome and the actual outcome of the election. The answer choice should give us a reason for this discrepancy.

(A) The interviewers did not reveal their own political affiliation to the respondents.
If the interviewer HAD REVEALED their own political affiliation, it may have altered the answers they received, however this says that they did not reveal their own political affiliation, so it should have not had any effect on the results of the survey.

(B) Only people who would be qualified to vote by election time were interviewed, so the survey sample was not representative of the overall United States population.
Again, if the opposite of this had happened, it would have had an effect on the survey results, but it didn't and therefore it should have not had any effect on the survey results.

(C) The survey sample was representative only of people who could afford telephones at a time when phone ownership was less common than it is today.
Bingo! This shows that there may be a reason as to why only some people in the population were excluded from the survey.

(D) No effort was made to determine the respondents’ political affiliations.
This is irrelevant. Even if respondents were asked about their political affiliations, it would not have had an effect on the outcome of the survey results.

(E) Because the poll asked only for respondents’ candidate preference, it collected no information concerning their reasons for favoring Landon or Roosevelt.
Again this is irrelevant. Even if the poll collected the reasons for favoring Landon or Roosevelt, it would not have had an effect on the survey results.

The correct answer is answer choice C.


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Re: In the summer of 1936 a polling service telephoned 10,000   [#permalink] 12 Jul 2019, 09:18
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