Last visit was: 14 Jul 2024, 10:27 It is currently 14 Jul 2024, 10:27
Toolkit
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

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.

# Are the standard deviations of set A and set B the same? 1) n=6 2) S

SORT BY:
Tags:
Show Tags
Hide Tags
Current Student
Joined: 14 Nov 2016
Posts: 1171
Own Kudos [?]: 20961 [11]
Given Kudos: 926
Location: Malaysia
Concentration: General Management, Strategy
GMAT 1: 750 Q51 V40 (Online)
GPA: 3.53
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 4490
Own Kudos [?]: 28832 [6]
Given Kudos: 130
General Discussion
Manager
Joined: 24 Oct 2016
Posts: 196
Own Kudos [?]: 66 [0]
Given Kudos: 89
Location: India
Concentration: Finance, International Business
Schools: IIMB
GMAT 1: 550 Q42 V28
GPA: 3.96
WE:Human Resources (Retail Banking)
Current Student
Joined: 01 Dec 2016
Posts: 79
Own Kudos [?]: 59 [0]
Given Kudos: 32
Concentration: Finance, Entrepreneurship
GMAT 1: 650 Q47 V34
WE:Investment Banking (Investment Banking)
Re: Are the standard deviations of set A and set B the same? 1) n=6 2) S [#permalink]
Very nice one.
It shows that SD measure the actually the "Dispersion" around the average value of the items.

(1)- Not sufficient
(2)- Sufficient. Can be done by trying different value of n.
Below is a formula approach
Attachments

File comment: Solution

solution.jpg [ 72.34 KiB | Viewed 2949 times ]

Non-Human User
Joined: 09 Sep 2013
Posts: 33966
Own Kudos [?]: 851 [0]
Given Kudos: 0
Re: Are the standard deviations of set A and set B the same? 1) n=6 2) S [#permalink]
Hello from the GMAT Club BumpBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email.
Re: Are the standard deviations of set A and set B the same? 1) n=6 2) S [#permalink]
Moderator:
Math Expert
94342 posts