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[IR] The table summarizes information in serveral categories

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Intern
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Joined: 14 Mar 2012
Posts: 28
Concentration: International Business, Finance
Schools: Sloan '15 (D), LBS '14 (D)
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[IR] The table summarizes information in serveral categories [#permalink] New post 03 Jul 2012, 11:42
Hi guys,

I don't understand the reasoning by the answer to question 2 is true.

Especially while the age goes from 29,9 to 28.4 even though the number of lanes is smaller.

Isn't this ONE case a positive correlation?

Can somebody please help.

BTW: Source is GMATPrev Software v2.1
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Joined: 09 May 2012
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Schools: Rotman '15 (A), Schulich '15 (A)
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Re: [IR] The table summarizes information in serveral categories [#permalink] New post 03 Jul 2012, 21:08
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hi there, first sort the average customer age field. You will notice the trend that as age increases, the number of self check unlimited lanes decreases. Like any set of real world data, don't expect it to be perfect. One or two outlier points can be expected. However, do look at the overall/big picture. For the most part, the number of self check unlimited lanes decreases with increasing age. Also the difference in age from 28.4 to 29.4 is small so the two dots on a scatter plot would be relatively close together without skewing the overall trend.
Intern
Intern
Joined: 14 Mar 2012
Posts: 28
Concentration: International Business, Finance
Schools: Sloan '15 (D), LBS '14 (D)
GMAT 1: 590 Q32 V30
GMAT 2: 700 Q48 V37
GPA: 3.6
Followers: 0

Kudos [?]: 13 [0], given: 28

Re: [IR] The table summarizes information in serveral categories [#permalink] New post 03 Jul 2012, 23:42
macjas wrote:
hi there, first sort the average customer age field. You will notice the trend that as age increases, the number of self check unlimited lanes decreases. Like any set of real world data, don't expect it to be perfect. One or two outlier points can be expected. However, do look at the overall/big picture. For the most part, the number of self check unlimited lanes decreases with increasing age. Also the difference in age from 28.4 to 29.4 is small so the two dots on a scatter plot would be relatively close together without skewing the overall trend.


Thanks macjas.

So as long as I have only ONE or TWO differences its ok. I will remember that.
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Re: [IR] The table summarizes information in serveral categories   [#permalink] 03 Jul 2012, 23:42
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