Last visit was: 17 Nov 2024, 07:50 It is currently 17 Nov 2024, 07:50
Decision Tracker
My Rewards
New comers' posts
New posts
Unanswered

Close

GRE Prep 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 GRE 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.

Go to My Error Log Learn more
Close

Request Expert Reply

Confirm Cancel
PREVIOUS TOPIC
NEXT TOPIC

Standard Deviation of 16, 5, 14, 5, 8, 16

Tags :
Find Similar Topics  About  Add a Tag

Show Tags
Hide Tags

avatar
Sonalika42
Manager
Manager
Joined: 12 Jan 2016
Posts: 142
Own Kudos [?]: 187 [0]
Given Kudos: 0
Send PM
Standard Deviation of 16, 5, 14, 5, 8, 16 [#permalink] New post   31 Aug 2016, 00:07
00:00

Question Stats:

87% (00:52) correct 12% (00:03) wrong based on 16 sessions

Hide Show timer Statistics

Quantity A
Quantity B
Standard Deviation of 16, 5, 14, 5, 8, 16
Standard Deviation of 6, 8, 18, 14, 18, 8




A)The quantity in Column A is greater.
B)The quantity in Column B is greater.
C)The two quantities are equal.
D)The relationship cannot be determined from the information given.
ShowHide Answer
Official Answer
B
avatar
Tapi
Intern
Intern
Joined: 09 Mar 2016
Posts: 32
Own Kudos [?]: 18 [0]
Given Kudos: 0
Send PM
Re: Standard deviation comparison [#permalink] New post   31 Aug 2016, 06:56
Can someone explain how to approach questions like this?
avatar
nainy05
Intern
Intern
Joined: 17 Apr 2017
Posts: 7
Own Kudos [?]: 13 [0]
Given Kudos: 0
Send PM
Re: Standard deviation comparison [#permalink] New post   05 Sep 2017, 12:02
What is the answer?
avatar
IlCreatore
Director
Director
Joined: 03 Sep 2017
Posts: 518
Own Kudos [?]: 702 [0]
Given Kudos: 0
Send PM
Re: Standard deviation comparison [#permalink] New post   16 Sep 2017, 23:20
1
I don't know if this is the fastest way to do it but I've used the "informal definition" of standard deviation of Greenlight Test Prep, i.e. the standard deviation is the mean of the distance of data values from the mean. Thus, we have that column A has a mean of 32/2 = 10.67 and column B has a mean of 12. Then, computing the distance for each value from the mean I get that the approximate standard deviation of column A is equal to 4.44, while for column B it is 4.67. Thus, the answer is B!
User avatar
D
Carcass
Verbal Expert
Joined: 18 Apr 2015
Posts: 29963
Own Kudos [?]: 36250 [0]
Given Kudos: 25912
Send PM
Re: Standard deviation comparison [#permalink] New post   18 Sep 2017, 05:42
3
Expert Reply
Put is simple case

A. 5 8 14 16

B. 6 8 14 18

The middle terms are negligible (are the same).

A. 16-5=11

B. 18-6=12

Answer is B
avatar
MostofaWahid
Intern
Intern
Joined: 04 Sep 2019
Posts: 13
Own Kudos [?]: 9 [0]
Given Kudos: 0
Send PM
Re: Standard deviation comparison [#permalink] New post   28 Sep 2019, 05:10
Apply, Manhattan 1-6 style, common-uncommon
avatar
bellavarghese
Manager
Manager
Joined: 18 Jun 2019
Posts: 122
Own Kudos [?]: 42 [0]
Given Kudos: 0
Send PM
Re: Standard deviation comparison [#permalink] New post   16 Oct 2019, 12:03
Carcass wrote:
Put is simple case

A. 5 8 14 16

B. 6 8 14 18

The middle terms are negligible (are the same).

A. 16-5=11

B. 18-6=12

Answer is B



thanks for this! My quickest approach was to subtract greatest and smallest value in each set too.
Prep Club for GRE Bot
gmatclubot
Re: Standard deviation comparison [#permalink]
16 Oct 2019, 12:03
Moderators:
adewale223
GRE Instructor
78 posts
bronaugust
GRE Forum Moderator
37 posts
BrushMyQuant
Moderator
1111 posts
VibhuAnurag
GRE Instructor
234 posts

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

Main navigation

Partners

GRE Resources

www.ets.org/gre | About | Terms and Conditions and Privacy Policy | Prep Club for GRE Rules | Contact