Summer is Coming! Join the Game of Timers Competition to Win Epic Prizes. Registration is Open. Game starts Mon July 1st.

It is currently 16 Jul 2019, 19:45

Close

GMAT Club Daily Prep

Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History

Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.

Close

Request Expert Reply

Confirm Cancel

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

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  
Author Message
TAGS:

Hide Tags

Find Similar Topics 
Manager
Manager
avatar
B
Joined: 12 Nov 2016
Posts: 135
Concentration: Entrepreneurship, Finance
GMAT 1: 620 Q36 V39
GMAT 2: 650 Q47 V33
Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

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?
Attachments

IR_IBN00867_img_001.png
IR_IBN00867_img_001.png [ 6.81 KiB | Viewed 2401 times ]

Manager
Manager
avatar
B
Joined: 12 Nov 2016
Posts: 135
Concentration: Entrepreneurship, Finance
GMAT 1: 620 Q36 V39
GMAT 2: 650 Q47 V33
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

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

Posted from my mobile device
Manager
Manager
avatar
D
Joined: 17 May 2015
Posts: 248
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 16 Nov 2017, 05:50
1
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.
BSchool Forum Moderator
avatar
P
Joined: 05 Jul 2017
Posts: 512
Location: India
GMAT 1: 700 Q49 V36
GPA: 4
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 13 Jun 2018, 05:06
Intern
Intern
avatar
B
Joined: 17 Mar 2016
Posts: 11
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 27 Dec 2018, 11:47
1
ganand wrote:
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.

Reviving this old thread....my issue with this question is that it's not really that strong. There's a few outliers that any academic would then question the entire dataset and need more data to make a real 'strong' conclusion (the question choices are 'Strong correlation' or none).

So, is the goal of any GMAT IR question to spot correlation to just think like someone who is just barely looking at data, or as a data scientist would? Just trying to figure these kinds of questions out,
Intern
Intern
avatar
B
Joined: 01 Jan 2019
Posts: 39
Location: Canada
Concentration: Finance, Economics
GPA: 3.24
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 09 Jan 2019, 11:42
Can someone explain the correlation?
Manager
Manager
User avatar
S
Joined: 05 Dec 2016
Posts: 241
Concentration: Strategy, Finance
GMAT 1: 620 Q46 V29
GMAT ToolKit User
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 14 Mar 2019, 01:04
The correlation is strongly positive. Potentially such type of problems would be easier to solve for those who are familiar with statistics, specifically regression models. If you try to formulate a linear equation basing on the figures above you would find that the trend is upward sloping showing general strong positive correlation.
Intern
Intern
avatar
Joined: 04 Mar 2019
Posts: 5
Re: Another correlation question on graph - is there any rule for it?  [#permalink]

Show Tags

New post 14 Mar 2019, 01:20
Anyone tell me about correlation.
GMAT Club Bot
Re: Another correlation question on graph - is there any rule for it?   [#permalink] 14 Mar 2019, 01:20
Display posts from previous: Sort by

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

  new topic post reply Question banks Downloads My Bookmarks Reviews Important topics  

Moderators: chetan2u, Bunuel






Powered by phpBB © phpBB Group | Emoji artwork provided by EmojiOne