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In 1987 sinusitis was the most common chronic medical

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In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 24 Aug 2012, 09:26
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Question Stats:

63% (02:23) correct 37% (01:31) wrong based on 322 sessions

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In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.
The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages.
The average age of the United States population will increase between 1987 and 2000.
Which of the following conclusions can be most properly drawn about chronic medical conditions in the United States from the information given above?
(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
[Reveal] Spoiler: OA

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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 03 Apr 2016, 13:14
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sa18 wrote:
Hi

Why cannot A be the answer?

My explanation for A:
The passage says The incidence rates for both arthritis and high blood pressure increase with age.....The average age of the United States population will increase between 1987 and 2000.
if the average age is expected to increase and we know that incidence rate for arthritis and high BP increase with age, we can say that incident rate for these two problems has reduced => Sinusitis will be more common.


Check the question stem once again -

Quote:
In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.


1. Sinusitis {Remains same with age }
2. Arthritis {Increases with age}
3. Blood Sugar {Increases with age}


Further it is given

Quote:
The average age of the United States population will increase between 1987 and 2000.


Consider simple numbers for the same

Let there be 2 people , age of the 2 people be 10 and 30

Average age of the 2 people in year 1 is = 20

Now consider their age after 10 years (considering there is no change in population ) , total age of the 2 people be 20 and 40

Average age of the 2 people in year 2 { after 10 years } is = 30


Since the probability of a person suffering from Sinusitis remains same irrespective of age , thus it will be same and it increases from 20 years in year 1 to 40 years in year 2

Further it is given that -
Quote:
The incidence rates for both arthritis and high blood pressure increase with age


Suppose the incidence rates for both arthritis and high blood pressure be 10% of the entire population in year 1 ,
According to the problem the incidence rates for both arthritis and high blood pressure will be 15% of the entire population in year 2


The above 2 statement simply demonstrates the increase in rate in incidence rates for both arthritis and high blood pressure with age and you can not simply claim that Sinusitis is more common than arthritis and high blood pressure
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 04 Apr 2016, 09:55
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Thanks a lot for the step by step explanation :)
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Re: In 1987 sinusitis was most common chronic medical condition [#permalink]

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New post 24 Aug 2012, 10:54
C is correct.

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. >> Can't say this from given info

(B) Arthritis will be the most common chronic medical condition in 2000. >> Can't say this from given info

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000. >> Note that passage says, average age of population will increase between 1987 - 2000. Passage also says that rate for sinusitis is the same for people of all ages. Additing these two data pointers, we can conclude C

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. >> Can't say this from given info

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. >> Too general.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 23 Jul 2015, 20:09
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 19 Feb 2016, 10:39
C is the correct answer

A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. >> Can't say this from given info

(B) Arthritis will be the most common chronic medical condition in 2000. >> Can't say this from given info

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000. >> Note that passage says, average age of population will increase between 1987 - 2000. Passage also says that rate for sinusitis is the same for people of all ages. Additing these two data pointers, we can conclude C

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. >> Can't say this from given info

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. >> Too general
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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New post 03 Apr 2016, 01:09
Hi

Why cannot A be the answer?

My explanation for A:
The passage says The incidence rates for both arthritis and high blood pressure increase with age.....The average age of the United States population will increase between 1987 and 2000.
if the average age is expected to increase and we know that incidence rate for arthritis and high BP increase with age, we can say that incident rate for these two problems has reduced => Sinusitis will be more common.
Re: In 1987 sinusitis was the most common chronic medical   [#permalink] 03 Apr 2016, 01:09
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