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Noting that the number of crimes committed in a certain city had decre

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Noting that the number of crimes committed in a certain city had decre  [#permalink]

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New post 06 Apr 2020, 11:50
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Noting that the number of crimes committed in a certain city had decreased in 1982 by 5.2 percent in comparison with 1981, the police chief of the city said, "We see here the result of the innovative police program put into effect in the city at the beginning of 1982."

Which of the following, if true, most seriously weakens the conclusion drawn by the police chief?

(A) Several cities that have recently increased spending for police programs experienced no decrease in crime in 1982, as compared with 1981.
(B) The number of crimes committed in the city is estimated, by the same method each year, from the number of crimes reported.
(C) The number of crimes committed in the suburban areas surrounding the city rose by about 5 percent in 1982 over the figure for 1981 and were nearly equal in number to those in the city in 1982.
(D) The number of crimes committed in the city in 1982 was 10 percent higher than the number committed in 1972.
(E) The size of the age-group most likely to commit crimes decreased considerably in the city in 1982, as against 1981, because of a declining birth rate.

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Noting that the number of crimes committed in a certain city had decre  [#permalink]

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New post 09 Apr 2020, 04:36
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A. What happens in other cities has no relevance to this city. Many parameters could be influencing the result.

B. This strengthens the argument.

C. Irrelevant.

D. Irrelevant to the argument.

E. This provides an alternative reason for why crimes could have decreased. Good.

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Re: Noting that the number of crimes committed in a certain city  [#permalink]

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New post 06 Jun 2020, 04:46
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Re: Noting that the number of crimes committed in a certain city had decre  [#permalink]

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New post 06 Jun 2020, 07:01
(A) Several cities that have recently increased spending for police programs experienced no decrease in crime in 1982, as compared with 1981.
irrelevant information that does not weaken the conclusion
(B) The number of crimes committed in the city is estimated, by the same method each year, from the number of crimes reported.
the method to calculate has remained the same , therefore this does not point out a flaw
(C) The number of crimes committed in the suburban areas surrounding the city rose by about 5 percent in 1982 over the figure for 1981 and were nearly equal in number to those in the city in 1982. we are concerned about the crimes in the city alone
(D) The number of crimes committed in the city in 1982 was 10 percent higher than the number committed in 1972. we are just concerned about the comparison between 1981 and 1982
(E) The size of the age-group most likely to commit crimes decreased considerably in the city in 1982, as against 1981, because of a declining birth rate. this gives an alternate explanation and weakens the conclusion, it is not because of the police efforts that the crime rates went down but because of this explanation
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Re: Noting that the number of crimes committed in a certain city had decre   [#permalink] 06 Jun 2020, 07:01

Noting that the number of crimes committed in a certain city had decre

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