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nitya34
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After observing the Earth’s weather patterns and the 11-year sunspot Updated on: 25 May 2019, 19:04
Originally posted by nitya34 on 25 Mar 2009, 04:32.
Last edited by BillyZ on 25 May 2019, 19:04, edited 2 times in total.
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!

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75% (01:52) correct 25% (02:10) wrong based on 2301 sessions

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After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.
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C
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icandy
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After observing the Earth’s weather patterns and the 11-year sunspot 25 Mar 2009, 08:31
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C for me

Conclusion is that meteorologists will be able to improve their weather forecasts based on this information.

We need to prove that meteorologists will NOT be able to improve their weather forecasts based on this information.

C exactly does that. What ever can be deduced using the Sun spot activity has been deduced from other activity. Hence S will NOT be able to improve.
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After observing the Earth’s weather patterns and the 11-year sunspot Updated on: 26 Mar 2009, 10:35
Originally posted by jainu on 25 Mar 2009, 07:31.
Last edited by jainu on 26 Mar 2009, 10:35, edited 1 time in total.
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This is again an instance of
cause1 ---> effect1,
to weaken find some other cause2 which also causes effect1.

In this question,
Information from sunspot activity ---> will help to determine weather forecasts
But B says that
Evidence other than sunspot activity ---- > has also enabled meteorologists to forecast the weather conditions.

Edit: Hence C
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After observing the Earth’s weather patterns and the 11-year sunspot 27 Jan 2010, 17:59
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My pic is C
If other evidence can be used to predict the whether then there is no need of sunspot activity.
sunspot activity can still be used to double check however there is no improvement in forecasts
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After observing the Earth’s weather patterns and the 11-year sunspot 27 Jan 2010, 18:11
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CN: meteorologists will be able to improve their weather forecasts based on this information.
Which of the following, if true, most seriously weakens the argument above?

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

-- This option says meteorologists already know this relationship from other source of information. So forecast will not improve.
This is the correct answer.
This question baffled me initially. Thanks for taking interest in this post guys.
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angel2009
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After observing the Earth’s weather patterns and the 11-year sunspot 27 Jan 2010, 20:00
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I also go for C. Lets follow POE approach
A , D--> Irrelevant
C --> Keep it
B --> at most it strengthen the argument
E--> No way related
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After observing the Earth’s weather patterns and the 11-year sunspot 17 Jul 2010, 10:20
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C makes most sense.

If meteorologist has already been able to forecast weather conditions with other evidences than saying that sunspot activity will help M to improve the forecast is weakened.
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After observing the Earth’s weather patterns and the 11-year sunspot 12 Apr 2019, 22:39
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Quote:
After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?
Show more

Conclusion: Meteorologists will be able to improve their weather forecasts based on weather patterns and the 11-year sunspot cycle of the Sun.

Quote:
(A) Weather forecasts are more detailed today than they were 36 years ago.
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Out of scope. Nothing about improvement of weather forecasts.

Quote:
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
Show more
Scientist's establishment does not matter. Out of scope.

Quote:
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
Show more
This is directly countering the conclusion. Correct.

Quote:
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
Show more
Reason for sun's 11-year cycle is immaterial.

Quote:
(E) It has been established that predictable wind patterns yield predictable weather patterns.
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This options gives no relation between weather forecasts and wind patterns/Sun cycles.
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After observing the Earth’s weather patterns and the 11-year sunspot 25 May 2019, 16:26
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nitya34
16. After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.
Show more

GMATNinja VeritasKarishma generis
I do not find the option C convincing enough....

Although there are evidences other than sunspot activity that have previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity ,
information about the sunspot activity can improve the weather forecasts .
I dont find option C a weakener....

Can you please throw some light VeritasKarishma generis GMATNinja ?
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After observing the Earth’s weather patterns and the 11-year sunspot 26 May 2019, 13:28
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nitya34
16. After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.

GMATNinja VeritasKarishma generis
I do not find the option C convincing enough....

Although there are evidences other than sunspot activity that have previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity ,
information about the sunspot activity can improve the weather forecasts .
I dont find option C a weakener....

Can you please throw some light VeritasKarishma generis GMATNinja ?
Show more

In a nutshell, C says that in the PAST meteorologists used some other indicators/source to collect data in order to predict weather and that this NEW finding will provide the same information to predict weather. So it means that nothing will change, and thus meteorologists will not be able to improve their predictions, which will be based on the same but from a different source.

I hope this helps
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After observing the Earth’s weather patterns and the 11-year sunspot 18 Oct 2022, 00:15
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nitya34
After observing the Earth’s weather patterns and the 11-year sunspot cycle of the Sun for 36 years, scientists have found that high levels of sunspot activity precede shifts in wind patterns that affect the Earth’s weather. One can conclude that meteorologists will be able to improve their weather forecasts based on this information.

Which of the following, if true, most seriously weakens the argument above?

(A) Weather forecasts are more detailed today than they were 36 years ago.
(B) Scientists can establish that sunspot activity directly affects the Earth’s weather.
(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.
(D) Scientists have not determined why the sunspot activity on the Sun follows an 11-year cycle.
(E) It has been established that predictable wind patterns yield predictable weather patterns.
Show more


GMATNinja, ThatDudeKnows, DmitryFarber, GMATNinjaTwo, IanStewart, MartyTargetTestPrep, RonPurewal, KarishmaB, MarkSullivan, AjiteshArun, EMPOWERgmatRichC, mikemcgarry, sayantanc2k, TommyWallach :
WRT C, what kind of evidence could it be that links sunspots to winds, apart from sunspot activity itself? Thanks
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After observing the Earth’s weather patterns and the 11-year sunspot 18 Oct 2022, 06:52
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WRT C, what kind of evidence could it be that links sunspots to winds, apart from sunspot activity itself? Thanks
Show more
Here's (C).

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

Notice that (C) doesn't say that the evidence has linked sunspots to winds.

Rather the point of (C) is that, by using the evidence mentioned by (C), meteorologists are already able to predict the weather conditions that they could predict by observing sunspot activity. In other words, (C) indicates that meteorologists can already predict those conditions WITHOUT LINKING THEM TO SUNSPOTS.
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After observing the Earth’s weather patterns and the 11-year sunspot 18 Oct 2022, 07:36
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StandardizedNerd
WRT C, what kind of evidence could it be that links sunspots to winds, apart from sunspot activity itself? Thanks
Here's (C).

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

Notice that (C) doesn't say that the evidence has linked sunspots to winds.

Rather the point of (C) is that, by using the evidence mentioned by (C), meteorologists are already able to predict the weather conditions that they could predict by observing sunspot activity. In other words, (C) indicates that meteorologists can already predict those conditions WITHOUT LINKING THEM TO SUNSPOTS.
Show more

Thank you for your reply, MartyTargetTestPrep! Im afraid I don't fully understand your reply. Let me try again-

What could that evidence be which enabled mets to predict the weather conditions by observing sunspot activities?
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After observing the Earth’s weather patterns and the 11-year sunspot 18 Oct 2022, 07:58
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WRT C, what kind of evidence could it be that links sunspots to winds, apart from sunspot activity itself? Thanks
Here's (C).

(C) Evidence other than sunspot activity has previously enabled meteorologists to forecast the weather conditions that are predictable on the basis of sunspot activity.

Notice that (C) doesn't say that the evidence has linked sunspots to winds.

Rather the point of (C) is that, by using the evidence mentioned by (C), meteorologists are already able to predict the weather conditions that they could predict by observing sunspot activity. In other words, (C) indicates that meteorologists can already predict those conditions WITHOUT LINKING THEM TO SUNSPOTS.

Thank you for your reply, MartyTargetTestPrep! Im afraid I don't fully understand your reply. Let me try again-

What could that evidence be which enabled mets to predict the weather conditions by observing sunspot activities?
Show more
The evidence mentioned by (C) is not directly related to sunspot activity. The point is that the evidence mentioned by (C) allows them to predict weather conditions without observing sunspot activity. The whole point of (C) is that they don't need to observe sunspot activity. They can predict the weather fine without being concerned with sunspot activity.
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After observing the Earth’s weather patterns and the 11-year sunspot 18 Oct 2022, 10:05
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StandardizedNerd

WRT C, what kind of evidence could it be that links sunspots to winds, apart from sunspot activity itself? Thanks
Show more

Perhaps sunspot activity increases tidal activity, and it's really tidal activity that affects wind patterns. If meteorologists have known about the relationship between tides and wind patterns for centuries, then learning that sunspot activity affects wind patterns (indirectly, because sunspots affect tides) won't help meteorologists to better predict the weather, because meteorologists are already accounting for the connection between tides and wind, and the sunspot data is redundant.

Answer C is suggesting a possibility along those lines -- they're already using other data to predict weather that accounts for sunspot effects somehow, so the sunspot information won't let them do their job any better.
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After observing the Earth’s weather patterns and the 11-year sunspot 13 Nov 2024, 05:45
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