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An author writing a book about birth order advertised in his local

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An author writing a book about birth order advertised in his local [#permalink]

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New post 25 Apr 2017, 07:31
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Difficulty:

  55% (hard)

Question Stats:

64% (01:47) correct 36% (02:00) wrong based on 172 sessions

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An author writing a book about birth order advertised in his local paper for people who were first born. Fifty people consented to be interviewed and assessed for certain personality traits. As the writer suspected, the interview results and personality assessments showed that first-borns were more goaloriented and serious-minded than random samples of the general public. These findings support the conclusion that people are affected by their birth order.

Which one of the following selections, if true, points out the most critical weakness in the method used by the author to investigate birth order characteristics?

(A) Last born children are typically more laid-back and calm than their older siblings.
(B) The interviews and assessments were performed by an outside firm, not by the author.
(C) People who saw the newspaper ad were not more likely to be first born than the number of first-born people in the population in general.
(D) The author’s subsequent contact with people who were middle children or last born tended to reinforce his initial impression of the character traits of people who were not first born.
(E) People who are not goal-oriented and seriousminded were not as likely to respond to the author’s newspaper ad nor were they as likely to agree to participate in the study.
[Reveal] Spoiler: OA

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Re: An author writing a book about birth order advertised in his local [#permalink]

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New post 03 Aug 2017, 15:54
Please explain. The point what kind of people will read the new paper is not asked.

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Re: An author writing a book about birth order advertised in his local [#permalink]

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New post 03 Aug 2017, 18:59
rghvaggarwal wrote:
Please explain. The point what kind of people will read the new paper is not asked.



hi,
it is stated that those who were studied or interviewed the ones who were more goal- oriented and serious minded than the general sample ,
prethinking - says that there is something else that caused these results or the sample is not true for all such only those people participated who were already having these characteristics or less people who do not have these characteristics participated in the study .

now look A,B and c are easily ruled out .

option D says nothing about sample or causes so out .
left with E which matches out pre thinking so wins .

hope it helps . kudos please :-D

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Re: An author writing a book about birth order advertised in his local [#permalink]

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New post 12 Sep 2017, 05:37
Can someone explain why option C is wrong?

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Re: An author writing a book about birth order advertised in his local   [#permalink] 12 Sep 2017, 05:37
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