Mean of a Data Set - 8

Oldest

Best Reply

Author

Message

TAGS:

Director

Status: Preparing for the 4th time -:(

Joined: 25 Jun 2011

Posts: 547

Location: United Kingdom

Concentration: International Business, Strategy

GMAT Date: 06-22-2012

GPA: 2.9

WE: Information Technology (Consulting)

Followers: 8

Kudos [?]: 71 [0], given: 212

Mean of a Data Set - 8 [#permalink]

23 Nov 2011, 14:02

00:00

Question Stats:

0% (00:00) correct

0% (00:00) wrong

based on 0 sessions

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 :-(

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: 278

Location: Kuwait

Schools: Columbia university

Followers: 4

Kudos [?]: 13 [1] , given: 52

Re: Mean of a Data Set - 8 [#permalink]

23 Nov 2011, 14:59

This post received
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: 457

Location: United States (MA)

Followers: 14

Kudos [?]: 84 [0], given: 46

Re: Mean of a Data Set - 8 [#permalink]

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: 278

Location: Kuwait

Schools: Columbia university

Followers: 4

Kudos [?]: 13 [1] , given: 52

Re: Mean of a Data Set - 8 [#permalink]

24 Nov 2011, 04:43

This post received
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: Mean of a Data Set - 8 [#permalink] 24 Nov 2011, 04:43

		Similar topics	Author	Replies	Last post
Similar Topics:		For a set of integers, A is the arithmetic mean and S is the	AJB77	9	29 Jul 2005, 18:30
		ds - mean of 2 sets	christoph	3	25 Oct 2005, 11:45
		Set S includes elements {8, 2, 11, x, 3, y} and has a mean	GMAT_700	6	24 Nov 2008, 18:37
		Mean of a set	enigma123	2	17 Nov 2011, 16:39
	1	Arithmetic Mean of SET X	enigma123	3	17 Nov 2011, 16:41

Mean of a Data Set - 8

Main navigation

GMAT Resources

Partners

MBA Resources

GMAT ® is a registered trademark of the Graduate Management Admission Council ® (GMAC ®). GMAT Club's website has not been reviewed or endorsed by GMAC.

GMAT Courses

Admissions Consulting

Mean of a Data Set - 8

Mean of a Data Set - 8

Main navigation

GMAT Resources

Partners

MBA Resources