It is currently 23 Nov 2017, 20:51

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

Events & Promotions

Events & Promotions in June
Open Detailed Calendar

If the standard deviation of Set Y is 4, what are the

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

Hide Tags

Manager
Manager
User avatar
Joined: 18 Jul 2013
Posts: 69

Kudos [?]: 97 [0], given: 114

Location: Italy
GMAT 1: 600 Q42 V31
GMAT 2: 700 Q48 V38
If the standard deviation of Set Y is 4, what are the [#permalink]

Show Tags

New post 03 Aug 2014, 15:52
2
This post was
BOOKMARKED
00:00
A
B
C
D
E

Difficulty:

  15% (low)

Question Stats:

75% (00:21) correct 25% (00:32) wrong based on 91 sessions

HideShow timer Statistics

If the standard deviation of Set Y is 4, what are the greatest and least values that are within one standard deviation of the mean?

(1) The median of Set Y is 5.

(2) The mean of Set Y is 6.
[Reveal] Spoiler: OA

Kudos [?]: 97 [0], given: 114

1 KUDOS received
Manager
Manager
User avatar
Joined: 22 Feb 2009
Posts: 210

Kudos [?]: 182 [1], given: 148

GMAT ToolKit User
Re: If the standard deviation of Set Y is 4, what are the [#permalink]

Show Tags

New post 03 Aug 2014, 23:21
1
This post received
KUDOS
1
This post was
BOOKMARKED
oss198 wrote:
If the standard deviation of Set Y is 4, what are the greatest and least values that are within one standard deviation of the mean?

(1) The median of Set Y is 5.

(2) The mean of Set Y is 6.



Standard deviation is how spread out the number are from the mean. The question asked for the greatest and least values that are within one standard deviation of the mean, reading from the question only, we know that we need the mean to calculate values.

(2) mean = 6, then greatest value = 6+4 = 10, least value = 6-4 = 2
(2) is sufficient. B is the answer.

As for (1), the median has nothing to do with standard deviation, so we can eliminate (1).
_________________

.........................................................................
+1 Kudos please, if you like my post

Kudos [?]: 182 [1], given: 148

Manager
Manager
User avatar
Joined: 18 Jul 2013
Posts: 69

Kudos [?]: 97 [0], given: 114

Location: Italy
GMAT 1: 600 Q42 V31
GMAT 2: 700 Q48 V38
Re: If the standard deviation of Set Y is 4, what are the [#permalink]

Show Tags

New post 04 Aug 2014, 15:22
vad3tha wrote:
oss198 wrote:
If the standard deviation of Set Y is 4, what are the greatest and least values that are within one standard deviation of the mean?

(1) The median of Set Y is 5.

(2) The mean of Set Y is 6.



Standard deviation is how spread out the number are from the mean. The question asked for the greatest and least values that are within one standard deviation of the mean, reading from the question only, we know that we need the mean to calculate values.

(2) mean = 6, then greatest value = 6+4 = 10, least value = 6-4 = 2
(2) is sufficient. B is the answer.

As for (1), the median has nothing to do with standard deviation, so we can eliminate (1).


You have got the correct answer, however i don't understand it. Standard deviation isn't the average of how is spread out the numbers form the mean?

Kudos [?]: 97 [0], given: 114

Non-Human User
User avatar
Joined: 09 Sep 2013
Posts: 15506

Kudos [?]: 283 [0], given: 0

Premium Member
Re: If the standard deviation of Set Y is 4, what are the [#permalink]

Show Tags

New post 23 Oct 2017, 19:25
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.
_________________

GMAT Books | GMAT Club Tests | Best Prices on GMAT Courses | GMAT Mobile App | Math Resources | Verbal Resources

Kudos [?]: 283 [0], given: 0

Re: If the standard deviation of Set Y is 4, what are the   [#permalink] 23 Oct 2017, 19:25
Display posts from previous: Sort by

If the standard deviation of Set Y is 4, what are the

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


GMAT Club MBA Forum Home| About| Terms and Conditions| GMAT Club Rules| Contact| Sitemap

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

Kindly note that the GMAT® test is a registered trademark of the Graduate Management Admission Council®, and this site has neither been reviewed nor endorsed by GMAC®.