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# Last year Comfort Airlines had twice as many delayed flights

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04 Jun 2017, 01:05
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The Official Guide for GMAT Review 2018

Practice Question
Question No.: CR640

Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?

(A) Comfort Airlines had more flight last year than the year before.

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.

(D) The average length of flight delay was greater last year than it was the year before.

(E) The average number of passengers per flight was no higher last year than the year before.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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29 Jun 2017, 19:57
2
D for me

a- out of scope
c-irrelevant
e-out of scope
b- if delay due to weather, passenger should not complaint, because it was not airlines fault.

d- if length of delays were increased, passengers will complaint, even though the same passengers did not complaint to that extant when these flights were delayed for shorter span of time.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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29 Jun 2017, 21:26
Imo D
If the duration of flights is delayed then more people will complain .They know about the delay but did not anticipated so long a delay.
A is actually strengthener because if no of flights are increased more people will travel and more complaints but still these complaints will be due to Comfort Airlines.
E is assumption required by the argument .
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30 Jun 2017, 02:25
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ganand wrote:
Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?

Hard to understand the argument well

Premise: Last year, 2x delayed flights, but 3x complaints
The service was improved
Conclusion: The complaints weren't about the service

The correct answer needs to explain the complaints not about the service but about other factors besides delayed flights

(A) Comfort Airlines had more flight last year than the year before.
This choice is irrelevant to the argument. This choice can't explain the disproportionate as the argument stated.

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.
Same as A. Bad weather caused a large number of flights to be delayed, then this information could just explain the 2x delayed flights last year. However, it can't explain why there were 3x complaints about delayed flights.
It should be 2x complaints, not 3x.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.
This choice helps to explain that the Comfort Airlines' service was improved last year. However, this choice can't explain the 3x complaints arose last year.

(D) The average length of flight delay was greater last year than it was the year before.
CORRECT as POE. Also, this choice suggests that there is a possible alternative to explain the disproportionate: There are more complaints last year because passengers not only complained about delayed flights but also complained about the longer delayed time that they had to wait for. This choice makes sense since there are two possible cases:

Case 1: There were some passengers made complaints more than once since they had to wait for more time.
Case 2: In the year before, although there were some delayed flights, few passengers made complaints since they just had to wait for short time, ie half an hour. Last year, there were 2x delayed flights, and almost passengers made complaints since they had to wait for such a long time, ie several hours.

These two cases could explain well the disproportionate as the argument stated.

(E) The average number of passengers per flight was no higher last year than the year before.
If the average number of passengers per flight remained no change, it supposed that the complaints should be 2 times as the year before. Hence, this choice can't explain the paradox.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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04 Jul 2017, 10:39
In choosing D, do we assume:
increased The average length of flight delay ==> more complaint?
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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12 Jul 2017, 19:28
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I am still not clear why A is incorrect.
I was confused between A and D and ended up choosing A.

For me both A and D needs to assume something to explain the disproportion.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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21 Jul 2017, 19:00
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282552 wrote:
I am still not clear why A is incorrect.
I was confused between A and D and ended up choosing A.

For me both A and D needs to assume something to explain the disproportion.

Lots of questions about A and D, so let's take a step back and make sure we understand the argument. First, identify the conclusion: "It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides." Why is this unlikely, according to the author?

• "Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times." - If all other factors remain the same, we would expect that doubling the number of flight delays would also double the number of complaints. Instead, flight complaints went up THREE TIMES. Why? Perhaps customers were dissatisfied with other aspects of the airline's service and not just the delays?
• However, "the airline made a special effort to IMPROVE other aspects of its service last year." Thus, we would not expect the number of complaints about other aspects of the airline's service to go up.

So what else could explain the disproportionate increase in complaints?

Quote:
(A) Comfort Airlines had more flight last year than the year before.

This might explain why the airline had twice as many delayed flights last year, but we still have an unexplained discrepancy: If the number of flight delays was doubled, why was the number of complaints tripled? (A) might be true, but it does not resolve the apparent discrepancy.

Quote:
(D) The average length of flight delay was greater last year than it was the year before.

Ah, before we were only considering the NUMBER of flight delays, not the LENGTH of those flight delays. Maybe in the year before last, the average length of the flight delays was relatively low. Thus, only a small portion of customers felt the need to complain. If the average length of the flight delays was HIGHER last year, that might prompt more customers to complain.

In other words, if the NUMBER of flight delays doubled but the LENGTH of those delays remained the same, then we would only expect the number of complaints to double. But if the number of flight delays doubled and the length of those delays INCREASED, we would expect more than twice the number of complaints.

Choice (D) resolves the apparent discrepancy and is the best choice.
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20 Oct 2017, 10:24
GMATNinja wrote:
282552 wrote:
I am still not clear why A is incorrect.
I was confused between A and D and ended up choosing A.

For me both A and D needs to assume something to explain the disproportion.

Lots of questions about A and D, so let's take a step back and make sure we understand the argument. First, identify the conclusion: "It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides." Why is this unlikely, according to the author?

• "Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times." - If all other factors remain the same, we would expect that doubling the number of flight delays would also double the number of complaints. Instead, flight complaints went up THREE TIMES. Why? Perhaps customers were dissatisfied with other aspects of the airline's service and not just the delays?
• However, "the airline made a special effort to IMPROVE other aspects of its service last year." Thus, we would not expect the number of complaints about other aspects of the airline's service to go up.

So what else could explain the disproportionate increase in complaints?

Quote:
(A) Comfort Airlines had more flight last year than the year before.

This might explain why the airline had twice as many delayed flights last year, but we still have an unexplained discrepancy: If the number of flight delays was doubled, why was the number of complaints tripled? (A) might be true, but it does not resolve the apparent discrepancy.

Quote:
(D) The average length of flight delay was greater last year than it was the year before.

Ah, before we were only considering the NUMBER of flight delays, not the LENGTH of those flight delays. Maybe in the year before last, the average length of the flight delays was relatively low. Thus, only a small portion of customers felt the need to complain. If the average length of the flight delays was HIGHER last year, that might prompt more customers to complain.

In other words, if the NUMBER of flight delays doubled but the LENGTH of those delays remained the same, then we would only expect the number of complaints to double. But if the number of flight delays doubled and the length of those delays INCREASED, we would expect more than twice the number of complaints.

Choice (D) resolves the apparent discrepancy and is the best choice.

GMATNinja

I thought it more simply. Please verify if I am correct.

A) Though the Airlines had more flights, with the given information, we have no reasons to conclude that the newly added flights were also delayed. We are given that the number of flight delays are twice - it could be 1 the year before and 2 flights last year, or it could be 10 the year before and 20 last year. We don't know for sure, whether the new flights which were added were also involved in delays. Hence A is not painting a clear picture and therefore is out.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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25 Oct 2017, 07:58
The conclusion states that the disproportionate increase does not come out of overall dissatisfaction with service. So even though increase in length of flight delay explains the disproportionate increase , it still comes out of overall dissatisfaction with service. This is why I crossed option D. Where I am going wrong here?
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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29 Oct 2017, 02:16
Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?
We need to find an alternative reason for the increase in customer complaints.
(A) Comfort Airlines had more flight last year than the year before. -Okay? Out of scope

(B) Last year a single period usually bad weather caused a large number of flights to be delayed. -Bad weather is a natural disaster for which no one complaints. This would weaken the argument

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations. -Okay? Out of scope

(D) The average length of flight delay was greater last year than it was the year before. -Correct. If the length of delay was more in last year as compared to that in previous year, then this option explains the reason because of which the customers might have complained.

(E) The average number of passengers per flight was no higher last year than the year before. -Okay? Out of scope
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04 Nov 2017, 05:39
ganand wrote:
The Official Guide for GMAT Review 2018

Practice Question
Question No.: CR640

Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?

(A) Comfort Airlines had more flight last year than the year before.

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.

(D) The average length of flight delay was greater last year than it was the year before.

(E) The average number of passengers per flight was no higher last year than the year before.

A: That doesn't explain why the number of complaints vis-a-vis to number of delays rose disproportionatelu

B: Same as A

C: Out of scope

D: More people from the same flight faced the issue and hence, the dissatisfaction. Answer

E: Weakens the finding then
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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06 Nov 2017, 11:29
Quote:

Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?

(A) Comfort Airlines had more flight last year than the year before.

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.

(D) The average length of flight delay was greater last year than it was the year before.

(E) The average number of passengers per flight was no higher last year than the year before.

By saying “It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year,” the argument is set up to make clear that the complaints are triggered by delays.

So we are faced with an unexplained disproportion. The number of delays doubled, but the number of complaints about delays tripled.

(A) Comfort Airlines had more flights last year than the year before.

This choice is tempting because if Comfort Airlines had more flights, then likely Comfort Airlines had more customers. If the same proportion of customers were to complain while the total number of customers increased, then we would have more complaints.

So, if you were looking for a reason for a general increase in complaints, this answer choice might provide that reason.

We are not, however, looking for a reason for a general increase in complaints. The prompt has already stated as fact that the number of delayed flights doubled. It would logically follow that a doubling in delayed flights would result in a doubling in complaints, NO MATTER HOW MANY FLIGHTS IN TOTAL COMFORT AIRLINES HAD LAST YEAR. Only the delayed flights should trigger complaints about delays.

So, this choice does nothing to explain why the complaints about delays would increase more than delays did.

(B) Last year, a single period of unusually bad weather caused a large number of flights to be delayed.

This choice indicates that there was likely a concentration of delays in one time period. A test-taker might construe that concentration as being the cause of the increase in complaints per delay.

It is not, however, clear that such a concentration of delayed flights would cause people to be more likely to complain about delays. Further, one could argue that people who are aware that weather caused the delays would not complain about the delays.

So, this choice does not explain why complaints increased more than delays increased.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.

While it is possible that a test-taker could interpret this answer choice to mean that Comfort Airlines only takes care of customers because of government involvement and thus has a poor customer service culture, the truth is that this answer choice does not indicate any change from one year to the next year in the attitude of Comfort Airlines toward customers, and therefore it does not explain why there would be a year to year change in the number of complaints.

Further, without additional information, it is close to impossible to reasonably argue that service improvements as a result of government regulation would result in increased complaints about delays. Service improvements should result in a decrease, rather than an increase, in complaints.

(D) The average length of flight delay was greater last year than it was the year before.

Correctly answering GMAT Critical Reasoning questions often requires using some common sense. So, let’s use some here.

It makes sense that the longer a delay, the more likely it is that people will complain about that delay. So, if the number of delays doubles AND the delays are longer, then likely the number of complaints will more than double.

Therefore, this is the answer that explains the disproportionate increase in complaints. Delays doubled, but the delays triggered more than twice as many complaints because the delays were longer.

(E) The average number of passengers per flight was no higher last year than the year before.

What this choice says actually RULES OUT a possible reason for the increase in complaints. If the number of passengers per flight had increased, then that increase could explain why there were more complaints per delay. Had there been more passengers per flight, then when delays doubled, more that twice as many passengers would have experienced those delays. So, in saying that the number of passengers per flight stayed the same, this choice rules out one possible reason for the increase in complaints.

To avoid choosing a choice like this one, which is relevant to the argument but does not answer the question, you have keep clear in your mind exactly what the question is asking you to find.

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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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03 Dec 2017, 12:07
Option A. If the number of flights increase, with twice the number of delays, the number of complaints can also increase disproportionately. Let me know if this explanation is ok
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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03 Dec 2017, 12:11
monidip1010 wrote:
Option A. If the number of flights increase, with twice the number of delays, the number of complaints can also increase disproportionately. Let me know if this explanation is ok

We are not looking for a reason for a general increase in complaints. The prompt has already stated as fact that the number of delayed flights doubled. It would logically follow that a doubling in delayed flights would result in a doubling in complaints, NO MATTER HOW MANY FLIGHTS IN TOTAL COMFORT AIRLINES HAD LAST YEAR. Only the delayed flights should trigger complaints about delays.

So, this choice does nothing to explain why the complaints about delays would increase more than delays did.
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Re: Last year Comfort Airlines had twice as many delayed flights [#permalink]

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06 Mar 2018, 12:12
Top Contributor
ganand wrote:
The Official Guide for GMAT Review 2018

Practice Question
Question No.: CR640

Last year Comfort Airlines had twice as many delayed flights as the year before, but the number of complaints from passengers about delayed flights went up three times. It is unlikely that this disproportionate increase in complaints was rooted in an increase in overall dissatisfaction with the service Comfort Airlines provides, since the airline made a special effort to improve other aspects of its service last year.

Which of the following, if true,most helps to explain the disproportionate increase in computer complaints?

(A) Comfort Airlines had more flight last year than the year before.

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.

(D) The average length of flight delay was greater last year than it was the year before.

(E) The average number of passengers per flight was no higher last year than the year before.

The paradox is that the number of complaints TRIPLED even though the number of delayed flights only DOUBLED.
All things considered equal, the number of complaints should have DOUBLED (not tripled).

So, we're looking for an answer choice that resolves this mystery.

Can you think of something that might explain the paradox? If so, then look for that explanation among the answer choices.
If you can't think of something, check each answer choice, and as you do so, keep reminding yourself of the paradox (complaints tripled even though delays only doubled)

(A) Comfort Airlines had more flight last year than the year before.
Does this explain why the number of complaints TRIPLED even though the number of delayed flights only DOUBLED?
No, it doesn't resolve the paradox.
ELIMINATE A

(B) Last year a single period usually bad weather caused a large number of flights to be delayed.
Does this explain why the number of complaints TRIPLED even though the number of delayed flights only DOUBLED?
No.
ELIMINATE B

(C) Some of the improvements that Comfort Airlines made in its service were required by new government regulations.
Does this explain why the number of complaints TRIPLED even though the number of delayed flights only DOUBLED?
No.
ELIMINATE C

(D) The average length of flight delay was greater last year than it was the year before.
Does this explain why the number of complaints TRIPLED even though the number of delayed flights only DOUBLED?
YES!!!
There were twice as many delays last year AND those delays were WORSE than the year before. So, there was even more to complain about!
That explains everything!
KEEP D

(E) The average number of passengers per flight was no higher last year than the year before.
Does this explain why the number of complaints TRIPLED even though the number of delayed flights only DOUBLED?
No.
ELIMINATE E

Cheers,
Brent
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Re: Last year Comfort Airlines had twice as many delayed flights   [#permalink] 06 Mar 2018, 12:12
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