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Another correlation question on graph - is there any rule for it?

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Manager
Manager
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B
Joined: 12 Nov 2016
Posts: 80

Kudos [?]: 2 [0], given: 37

Location: Kazakhstan
Concentration: Entrepreneurship, Finance
Schools: Sloan (S)
GMAT 1: 620 Q36 V39
GPA: 3.2
Another correlation question on graph - is there any rule for it? [#permalink]

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New post 15 Nov 2017, 02:49
During a four-day period, a height measurement and a weight measurement were recorded shortly after delivery for each baby born in a particular hospital. The 19 babies in the study were divided into two groups, Group A and Group B. The chart shows the length, in centimeters (cm), and weight, in kilograms (kg), for each of the 19 babies.

Based on the given information, use the drop-down menus to most accurately complete the following statements.

The correlation between length and weight for the babies in the study is
negligible
strongly positive .
strongly negative

Is there a rule to decide on correlation? What I see here is that two babies with height 47 weigh differently and again at weight 48 and 4 babies with different weights at height 51 where two are much heavier, does not it contradict strong correlation?
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Kudos [?]: 2 [0], given: 37

Manager
Manager
User avatar
B
Joined: 12 Nov 2016
Posts: 80

Kudos [?]: 2 [0], given: 37

Location: Kazakhstan
Concentration: Entrepreneurship, Finance
Schools: Sloan (S)
GMAT 1: 620 Q36 V39
GPA: 3.2
Re: Another correlation question on graph - is there any rule for it? [#permalink]

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New post 16 Nov 2017, 04:57
It is probably due to structure of GMAT that IR does not count towards total score that there is little interest in IR questions... probably a growing trend for EA acceptance by leading business will change that

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Kudos [?]: 2 [0], given: 37

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Manager
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Joined: 17 May 2015
Posts: 209

Kudos [?]: 246 [1], given: 73

Re: Another correlation question on graph - is there any rule for it? [#permalink]

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New post 16 Nov 2017, 05:50
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Erjan_S wrote:
During a four-day period, a height measurement and a weight measurement were recorded shortly after delivery for each baby born in a particular hospital. The 19 babies in the study were divided into two groups, Group A and Group B. The chart shows the length, in centimeters (cm), and weight, in kilograms (kg), for each of the 19 babies.

Based on the given information, use the drop-down menus to most accurately complete the following statements.

The correlation between length and weight for the babies in the study is
negligible
strongly positive .
strongly negative

Is there a rule to decide on correlation? What I see here is that two babies with height 47 weigh differently and again at weight 48 and 4 babies with different weights at height 51 where two are much heavier, does not it contradict strong correlation?


HiErjan_S,

To find the correlation, observe the overall trend rather than individual values. You have to oberve the overall direction of the given values. In the given example its clear that height and weight are strongly positively correlated.
Check the following link:
http://www.statisticshowto.com/directio ... sociation/

Hope it helps.

Kudos [?]: 246 [1], given: 73

Re: Another correlation question on graph - is there any rule for it?   [#permalink] 16 Nov 2017, 05:50
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