Find all School-related info fast with the new School-Specific MBA Forum

 It is currently 24 Oct 2016, 08:26

### 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

# Events & Promotions

###### Events & Promotions in June
Open Detailed Calendar

# If the mean of a data set is 75 and the standard deviation is 10, what

Author Message
TAGS:

### Hide Tags

Director
Status: Finally Done. Admitted in Kellogg for 2015 intake
Joined: 25 Jun 2011
Posts: 537
Location: United Kingdom
GMAT 1: 730 Q49 V45
GPA: 2.9
WE: Information Technology (Consulting)
Followers: 71

Kudos [?]: 2700 [0], given: 217

If the mean of a data set is 75 and the standard deviation is 10, what [#permalink]

### Show Tags

23 Nov 2011, 14:02
00:00

Difficulty:

(N/A)

Question Stats:

100% (00:00) correct 0% (00:00) wrong based on 1 sessions

### HideShow timer Statistics

If the mean of a data set is 75 and the standard deviation is 10, what is the range of scores that fall within one standard deviation of the mean?

How can I solve these kind of questions guys? What's the meaning of one SD from the mean? I am struggling badly.
_________________

Best Regards,
E.

MGMAT 1 --> 530
MGMAT 2--> 640
MGMAT 3 ---> 610
GMAT ==> 730

Senior Manager
Status: D-Day is on February 10th. and I am not stressed
Affiliations: American Management association, American Association of financial accountants
Joined: 12 Apr 2011
Posts: 270
Location: Kuwait
Schools: Columbia university
Followers: 4

Kudos [?]: 252 [1] , given: 52

Re: If the mean of a data set is 75 and the standard deviation is 10, what [#permalink]

### Show Tags

23 Nov 2011, 14:59
1
KUDOS
score ranges between 85 and 65, where 85 is within one Standard deviation above the mean and 65 is within one standard deviation below the mean
_________________

Sky is the limit

Senior Manager
Joined: 28 Jun 2009
Posts: 454
Location: United States (MA)
Followers: 18

Kudos [?]: 159 [0], given: 46

Re: If the mean of a data set is 75 and the standard deviation is 10, what [#permalink]

### Show Tags

23 Nov 2011, 16:02
So range is 85 - 65 = 20
Senior Manager
Status: D-Day is on February 10th. and I am not stressed
Affiliations: American Management association, American Association of financial accountants
Joined: 12 Apr 2011
Posts: 270
Location: Kuwait
Schools: Columbia university
Followers: 4

Kudos [?]: 252 [1] , given: 52

Re: If the mean of a data set is 75 and the standard deviation is 10, what [#permalink]

### Show Tags

24 Nov 2011, 04:43
1
KUDOS
if the mean of a data set is 75 and the standard deviation is 10, what is the range of scores that fall within one standard deviation of the mean?

what I meant is that the range of scores within one standard deviation from the mean, which is 75, falls between 85 and 65.

got the 85 by adding 10 to 75
got 65 by subtracting 10 from 75
this range falls within one SD from the mean of 75.

further expl.

if you want to get the range of scores that fall within 2SD from the mean is by:
adding 20, to 75 ,which results in 95
subtracting 20 from 75, which results in 55.
so the range of scores that falls between 2 SD from the mean is scores from 55 to 95.

so, you just need to add SD to the mean, and subtract the SD from the mean in order to get the range of scores that falls within one standard deviation

hope this helps,
_________________

Sky is the limit

Re: If the mean of a data set is 75 and the standard deviation is 10, what   [#permalink] 24 Nov 2011, 04:43
Similar topics Replies Last post
Similar
Topics:
The following sets each have a mean of 10 and the standard deviations 2 30 Aug 2016, 17:12
A set has an average (arithmetic mean) of 42 and a standard deviation 2 15 Aug 2016, 04:02
6 Which of the following data sets has the third largest standard deviat 1 18 May 2016, 11:44
8 Set S has a mean of 10 and a standard deviation of 1.5. We are going 4 03 Mar 2015, 06:58
4 A data set with a mean of 60 has a standard deviation of 3.5 6 04 Jan 2014, 19:54
Display posts from previous: Sort by