I05-01

Question

https://gmatclub.com/forum/download/file.php?id=81284 GMAT-Club-Forum-4oqt34tk.png Improved version of this question is discussed HERE .

abhimahna · Answer

Official Solution:   
 
The range for the offline migration was 33 - 21 =  \12 seconds.

Meanwhile, the range for the cloning migration was 49.5 - 44.5 =  /5 seconds.

12 is more than two times 5.

Correct answer:

The standard deviation for the results of the ten tests was greater for the cloning migration than for the offline migration.  "Not supported"

The median time was greater than the average time for each of the two types of migrations.  "Not supported"

The range for the offline migration tests was more than twice that of the cloning migration tests.  "Supported"

abhinav1239 · Answer

Please clarify how standard deviation is greater for offline migration. The difference from the mean in higher for cloning migration in most cases.

Sasleen · Answer

Bunuel ,  abhimahna 
From the bar graphs, the standard deviation looks greater for Cloning migration than for offline migration. Please clarify how can we conclude that offline migration has greater standard deviation. Thanks

Prince1890Sharma · Answer

Hello  Bunuel ,

Can you please confirm if the answer to option A is correct or not?

UMISTERIO2024 · Answer

I think this is a  poor-quality  question and I don't agree with the explanation. please question 1 need clarification

ShrikunjAgrawal · Answer

Look at the scale of graph

Amrita01 · Answer

I think this is a  poor-quality  question and the explanation isn't clear enough, please elaborate.

MBhavya · Answer

KarishmaB   GMATNinja  Please help with the Standard deviation part of the question. There seems to be a lot of confusion here.

https://gmatclub.com/gmat-focus-tests/resources/import/img/I05-01.png    
  Figure 1: Cloning Migration

https://gmatclub.com/gmat-focus-tests/resources/import/img/I05-02.png    
  Figure 2: Offline Migration

awesome_burst · Answer

I think this is a  high-quality  question and the explanation isn't clear enough, please elaborate.

Randomguyy21 · Answer

I think this is a  poor-quality  question and the explanation isn't clear enough, please elaborate.

The8 · Answer

I also made the mistake in first question of std. deviation comparison but what we are missing is probably that the scale of two charts is different, for the first chart the step up is 1 while for the second chart it is 5, so the std. deviation for the cloning is less than for offline migration

Nestor_Izuit · Answer

I don’t quite agree with the solution. question 1 need clarification

nousernamefine · Answer

I did not quite understand the solution. For Part 1 why is it not supported? For Cloning, test results have some deviation around average line. For offline, test results are very close to average. So "Yes" supported

miag · Answer

Hi  Bunuel   GMATNinja   Bismuth83  - can someone help explain this?

miag · Answer

If the question statement says select "supported" if it can be determined, does this mean that as long as we have an answer - true/false it can be supported? Or that "supported" holds true only if the statement is supported so if sd (cloning) is not greater then would it be supported/not supported?  Bismuth83  thank you!

Bismuth83 · Answer

Let me help you with that!

The logic is the following, "select Supported if the statement listed can be determined as factual based on the information in tabs 2 and 3. Otherwise, select Not supported."

If we can deduce an answer to statement based on information and it is shown as false, then it isn't factual. Since it's not factual we can't select supported for the statement.

I hope that cleared things up!

Bismuth83 · Answer

The bar graphs do a trick on changing the scale.

The way I see it, in figure 1 all bars are within +-2 of the average except for Test 06. For figure 2, all bars are within +-2 of the average except for Test 08. That means the standard deviations are mainly dependent on those two outliers.

Test 06 has a distance of about 3.5 from the average, while test 08 has a distance of 11 from the average. This clearly shows that the standard deviation for Offline migration is larger.

I hope that helped!

Bunuel · Answer

Improved version of this question is discussed  HERE .

I05-01

Prep Toolkit

Top 5 GMAT Debrief Videos

615 to 715 in 15 Days (Ria's Strategies)

More than Quant/Verbal Abilities: Speed vs. Accuracy

745 with Only Self-Prep and GMAT Club

From 555 to 765: 210-point Improvement

Perfect 805 Score Debrief by Julia

My Rewards

Supported	Not supported
		The standard deviation for the results of the ten tests was greater for the cloning migration than for the offline migration.
		The median time was greater than the average time for each of the two types of migrations.
		The range for the offline migration tests was more than twice that of the cloning migration tests.