In 1987 sinusitis was the most common chronic medical : GMAT Critical Reasoning (CR)
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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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06 Dec 2010, 12:32
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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.

I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks.
[Reveal] Spoiler: OA

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

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07 Dec 2010, 03:11
ajit257 wrote:
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. - Not mentioned anywhere in the para. Eliminate.
(B) Arthritis will be the most common chronic medical condition in 2000. - Eliminate
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000. - Hold.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. - Eliminate.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. - Chances of suffering from Arthritis or High BP might increase as the average age of the population increases. But this dosen't mean that the population will suffer from these two ailments too. - Eliminate

I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks.

From the two statements marked in the argument one can infer C. Also,consider a sample of people of different ages. As the ages increase the average increases.Hence statement C is true.

I believe this will help.
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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07 Dec 2010, 14:38
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I vote for C since it is more logical than any other choices.
Between 87 to 2000 ppl having sinus will grow and their average age will also increase.
IMO C
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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08 Dec 2010, 11:39
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ajit257 wrote:
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.

I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks.

One important point you need to understand to understand this question is the increase in average age of a population.
Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today)
So when we say average life increased, it is probably because there are more aged people.

Premises:
- In 1987 sinusitis most common chronic condition followed by arthritis and high blood pressure
- More arthritis and high blood pressure with age
- Incidence of sinusitis is the same for people of all ages
- Average age will increase between 1987 and 2000.

Let's refresh what we said about conclusion questions - should be implied from the argument and should give no new data.

(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
With increase in average age, we cannot say this. It is possible that other two become more common.

(B) Arthritis will be the most common chronic medical condition in 2000.
Definitely no reason to pick Arthritis out of the two - BP and Arthritis so no need to even think about it.

(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
Since incidence of sinusitis is the same for all ages, we can conclude that the average age of a person suffering from Sinusitis is the same as the average age of the population. Since average age of population will increase, average age of people suffering from Sinusitis will also increase.

(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
Sinusitis does not depend on age so cannot be concluded.

(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.
No reason to conclude this.
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Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Manager Joined: 01 Nov 2010 Posts: 181 Location: Zürich, Switzerland Followers: 2 Kudos [?]: 38 [0], given: 20 Re: In 1987 sinusitis was the most common chronic medical [#permalink] ### Show Tags 09 Dec 2010, 01:28 Premise:- The average age of the United States population will increase between 1987 and 2000. What above statement means- With increased avearage age, people live longer. What it does not mean-There will be more elderly people overall. This is since there might be more babies born in the same period although deaths among adults are deferred, causing equalizer effect to the entire age group. Thus, one can not conclude- "There will be more cases of old age diseases (Arthitis or high blood pressuire) compared to the all age disease- Sinusitis". One can colclude- The overall increase in living age will result into increase in the number people with all age group disease which is Sinusitis. Answer:- C Verbal Forum Moderator Joined: 31 Jan 2010 Posts: 498 WE 1: 4 years Tech Followers: 12 Kudos [?]: 139 [0], given: 149 Re: In 1987 sinusitis was the most common chronic medical [#permalink] ### Show Tags 15 Dec 2010, 02:45 VeritasPrepKarishma wrote: ajit257 wrote: 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. I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks. One important point you need to understand to understand this question is the increase in average age of a population. Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today) So when we say average life increased, it is probably because there are more aged people. (E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. No reason to conclude this. Karishma You said there are more aged people. So the majority of the population is aged and the incidence of arthritis and high BP increases with age.Isnt this enough to conclude that A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. _________________ My Post Invites Discussions not answers Try to give back something to the Forum.I want your explanations, right now ! Please let me know your opinion about the Chandigarh Gmat Centrehttp://gmatclub.com/forum/gmat-experience-at-chandigarh-india-centre-111830.html Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 7125 Location: Pune, India Followers: 2137 Kudos [?]: 13672 [2] , given: 222 Re: In 1987 sinusitis was the most common chronic medical [#permalink] ### Show Tags 15 Dec 2010, 04:42 2 This post received KUDOS Expert's post mundasingh123 wrote: VeritasPrepKarishma wrote: ajit257 wrote: 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. I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks. One important point you need to understand to understand this question is the increase in average age of a population. Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today) So when we say average life increased, it is probably because there are more aged people. (E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. No reason to conclude this. Karishma You said there are more aged people. So the majority of the population is aged and the incidence of arthritis and high BP increases with age.Isnt this enough to conclude that A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. No. We do not know the current incidence of sinusitis, arthritis and high BP. The 'average age increases' implies either people live longer than before or no. of people who are aged are more than before or both, but it doesn't imply that majority of people are aged. 'Majority' means more than half. We have no data to conclude that more than half people will be aged. We also have no data to conclude that majority of people will have one of the given diseases e.g. Sinusitis incidence - 10 in 100 people Arthritis - 3 in 100 aged people High BP - 2 in 100 aged people When the population becomes more aged: e.g. Sinusitis incidence - 10 in 100 Arthritis - 5 in 100 aged people High BP - 3 in 100 aged people Not every one who is aged, has to have one of these diseases. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

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

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15 Dec 2010, 07:13
Thanks karishma for the help
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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15 Dec 2010, 12:58
+1 C
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In 1987 sinusitis was the most common chronic medical [#permalink]

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26 Sep 2015, 13:55
not enough reason to choose C
the incidence rate is same for sinoc at all ages
It DOES NOT mean it avg age of people suff from sinoc WILL INCREASE !
lets check, 100 people of different ages, all have same probability to catch sinoc (it does not mean ALL OF THEM will get sinoc for sure). What if only one person aged 20 yrs is infected with sinoc and others are okay ? Will it SURELY INCREASE the avg age of people attacked with sinoc (option C) ???
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Re: In 1987 sinusitis was the most common chronic medical [#permalink]

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28 Sep 2015, 01:41
oishik wrote:
not enough reason to choose C
the incidence rate is same for sinoc at all ages
It DOES NOT mean it avg age of people suff from sinoc WILL INCREASE !
lets check, 100 people of different ages, all have same probability to catch sinoc (it does not mean ALL OF THEM will get sinoc for sure). What if only one person aged 20 yrs is infected with sinoc and others are okay ? Will it SURELY INCREASE the avg age of people attacked with sinoc (option C) ???

"the incidence rate for sinusitis is the same for people of all ages." implies that the % of people who get it will be the same in all age ranges.
So if 1% of 20 yr olds get it, only 1% of 30 year olds will get it and only 1% of 3 yr olds will get it. So people who get sinusitis are a small but proportionate sample of the entire population. Since the representation of each age group is the same as in the actual population,

Average age of people with sinusitis = Average age of the population.

If average age of the population goes up, the average age of people with sinusitis will go up.
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Get started with Veritas Prep GMAT On Demand for $199 Veritas Prep Reviews Manager Joined: 22 Sep 2015 Posts: 118 Followers: 3 Kudos [?]: 38 [0], given: 136 Re: In 1987 sinusitis was the most common chronic medical [#permalink] ### Show Tags 09 Jul 2016, 17:17 VeritasPrepKarishma wrote: ajit257 wrote: 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. I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks. One important point you need to understand to understand this question is the increase in average age of a population. Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today) So when we say average life increased, it is probably because there are more aged people. Premises: - In 1987 sinusitis most common chronic condition followed by arthritis and high blood pressure - More arthritis and high blood pressure with age - Incidence of sinusitis is the same for people of all ages - Average age will increase between 1987 and 2000. Let's refresh what we said about conclusion questions - should be implied from the argument and should give no new data. (A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. With increase in average age, we cannot say this. It is possible that other two become more common. (B) Arthritis will be the most common chronic medical condition in 2000. Definitely no reason to pick Arthritis out of the two - BP and Arthritis so no need to even think about it. (C) The average age of people suffering from sinusitis will increase between 1987 and 2000. Since incidence of sinusitis is the same for all ages, we can conclude that the average age of a person suffering from Sinusitis is the same as the average age of the population. Since average age of population will increase, average age of people suffering from Sinusitis will also increase. (D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. Sinusitis does not depend on age so cannot be concluded. (E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. No reason to conclude this. could someone explain why its not B? The premise says that arthritis is the 2nd most common overall. Arthritis becomes more common as age increases. So if the avg age of population will increase, won't arthritis increase bc it will happen more often? so if 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds, if there will be more 80 year olds, doesn't that mean the % will go up because it skews to the higher end? Veritas Prep GMAT Instructor Joined: 16 Oct 2010 Posts: 7125 Location: Pune, India Followers: 2137 Kudos [?]: 13672 [0], given: 222 Re: In 1987 sinusitis was the most common chronic medical [#permalink] ### Show Tags 11 Jul 2016, 22:38 nycgirl212 wrote: VeritasPrepKarishma wrote: ajit257 wrote: 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. I am having some difficulty in drawing conclusion questions. Please can some provide some helpful pointers to tackle such questions.. thanks. One important point you need to understand to understand this question is the increase in average age of a population. Lets say average age of US population is 40 yrs. (Add ages of all people and divide by the number of people). The average age need not increase with time (it can even reduce e.g. when life expectancy decreases; people live shorter lives; lots of new babies are born) If average age increases to 50 yrs, it means people are living longer lives or not many new babies are being born or both (a problem being faced by much of the developed world today) So when we say average life increased, it is probably because there are more aged people. Premises: - In 1987 sinusitis most common chronic condition followed by arthritis and high blood pressure - More arthritis and high blood pressure with age - Incidence of sinusitis is the same for people of all ages - Average age will increase between 1987 and 2000. Let's refresh what we said about conclusion questions - should be implied from the argument and should give no new data. (A) Sinusitis will be more common than either arthritis or high blood pressure in 2000. With increase in average age, we cannot say this. It is possible that other two become more common. (B) Arthritis will be the most common chronic medical condition in 2000. Definitely no reason to pick Arthritis out of the two - BP and Arthritis so no need to even think about it. (C) The average age of people suffering from sinusitis will increase between 1987 and 2000. Since incidence of sinusitis is the same for all ages, we can conclude that the average age of a person suffering from Sinusitis is the same as the average age of the population. Since average age of population will increase, average age of people suffering from Sinusitis will also increase. (D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987. Sinusitis does not depend on age so cannot be concluded. (E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000. No reason to conclude this. could someone explain why its not B? The premise says that arthritis is the 2nd most common overall. Arthritis becomes more common as age increases. So if the avg age of population will increase, won't arthritis increase bc it will happen more often? so if 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds, if there will be more 80 year olds, doesn't that mean the % will go up because it skews to the higher end? In ranking: Sinusitis Arthritis High BP Incidences of both, Arthritis and high BP increase with age. What if high BP incidence increases much more with age? For arthritis: 60% of 60 year old have it now, 70% of 70 year olds and 80% of 80 year olds For high BP: 50% of 60 year old have it now, 75% of 70 year olds and 95% of 80 year olds We don't know the rate at which the incidence increases in the two diseases. So option (B) is not NECESSARILY true. _________________ Karishma Veritas Prep | GMAT Instructor My Blog Get started with Veritas Prep GMAT On Demand for$199

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Re: In 1987 sinusitis was the most common chronic medical   [#permalink] 11 Jul 2016, 22:38
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