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# [IR] The table summarizes information in serveral categories

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Intern
Joined: 14 Mar 2012
Posts: 26
GMAT 1: 590 Q32 V30
GMAT 2: 700 Q48 V37
GPA: 3.6
[IR] The table summarizes information in serveral categories  [#permalink]

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03 Jul 2012, 11:42
3
10
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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?

BTW: Source is GMATPrev Software v2.1
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Senior Manager
Affiliations: UWC
Joined: 09 May 2012
Posts: 337
GMAT 1: 620 Q42 V33
GMAT 2: 680 Q44 V38
GPA: 3.43
WE: Engineering (Entertainment and Sports)
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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03 Jul 2012, 21:08
13
9
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
Joined: 14 Mar 2012
Posts: 26
GMAT 1: 590 Q32 V30
GMAT 2: 700 Q48 V37
GPA: 3.6
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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03 Jul 2012, 23:42
1
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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Joined: 21 Nov 2012
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Re: [IR] The table summarizes information in serveral categories  [#permalink]

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16 Jul 2013, 19:53
Could someone please explain how to decide on True/False for the third statement of the question?

Thanks.
Intern
Joined: 19 Jul 2013
Posts: 1
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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15 Sep 2013, 00:02
As for the third statement, sort the table by Self-check express lanes. Look above the average and below the average. There are three stores (I, H, C) below the average. All of them do have restaurants. On the other hand, there are six stores (A, B, D, F, G, E) above the average. Most of them do not have restaurants. It is stated that stores with fewer lanes are less likely to have restaurants than stores with more lanes. But it's quite on the contrary. So, the statement is false.
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Joined: 15 Jan 2014
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Concentration: Healthcare, Strategy
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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31 Mar 2014, 11:11
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.

So because it's a "negative correlation" we can make the assumption that is an "overall negative correlation?" Is correlation the key here in making assumptions like this on IR?

Thanks!
Intern
Joined: 05 May 2018
Posts: 6
Location: India
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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14 Jun 2018, 07:15
i am also confused that why answer to statement 2 is marked "true". because there is not uniform negative correlation. there are some exceptions also.

thanks
Intern
Status: GMAT in August 2018
Joined: 05 Mar 2018
Posts: 45
Location: India
WE: Law (Consulting)
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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02 Jul 2018, 08:33
solarzj wrote:
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?

BTW: Source is GMATPrev Software v2.1

Hi, could I please request if someone could guide me on Q2. It asks for a negative co-relation - which is absent in the data.

Then why is the answer true, thanks. Attaching a snapshot for ease.
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GMAT CLUB.docx [171.01 KiB]

Intern
Joined: 22 Jun 2017
Posts: 14
Location: India
GMAT 1: 670 Q48 V34
GPA: 4
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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11 Aug 2018, 04:32
If you put all these points on graph, except for one value, all other values will look in getting reduced as you progress. So overall (collectively) it shows negative trend, if you put a trend line it will have a negative slope .... so the answer is true. Go by collective pattern
Intern
Joined: 06 Feb 2019
Posts: 13
Re: [IR] The table summarizes information in serveral categories  [#permalink]

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04 Jul 2019, 03:48
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.

There are three outliers though: store I, store E and store F, that's 1/3 as an outlier; what is the cutoff point?
Re: [IR] The table summarizes information in serveral categories   [#permalink] 04 Jul 2019, 03:48
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