If sets A and B have the same number of terms, is the

Oldest

Best Reply

Author

Message

TAGS:

Manager

Joined: 29 Nov 2011

Posts: 83

Followers: 0

Kudos [?]: 8 [0], given: 37

If sets A and B have the same number of terms, is the [#permalink]

20 May 2012, 22:48

00:00

Question Stats:

100% (00:00) correct

0% (00:00) wrong

based on 0 sessions

If sets A and B have the same number of terms, is the standard deviation of set A greater than the standard deviation of set B?

(1) The range of set A is greater than the range of set B.
(2) Sets A and B are both evenly spaced sets.

Manager

Joined: 05 Dec 2011

Posts: 78

Location: Canada

Concentration: Accounting, Finance

GMAT Date: 09-08-2012

GPA: 3

Followers: 0

Kudos [?]: 16 [0], given: 2

Re: If sets A and B have the same number of terms, is the standa [#permalink]

21 May 2012, 00:25

+1 C

1.We dont have enough info. Range could be 2, 10,10,10,20 this will have a lower SD or 2,3,3,3,3,20 will have a higher SD, same range.
2. We don't know the ranges.

Together They have the same number of terms evenly spaced, no repeats, and A has a greater range= Greater SD.
_________________

Thanks = +1 Kudos

Study from reliable sources!!

Thursdays with Ron: http://www.manhattangmat.com/thursdays-with-ron.cfm

Gmat Prep Questions:
CR gmatprepsc-105446.html
SC gmatprepsc-105446.html

Senior Manager

Joined: 30 Jun 2011

Posts: 272

Followers: 0

Kudos [?]: 10 [1] , given: 20

Re: If sets A and B have the same number of terms, is the [#permalink]

22 May 2012, 08:35

This post received
KUDOS

Yes C is correct,

Standard deviation describes how the values in a set deviate from the mean.

(1) The range of set A is greater than the range of set B.
This gives only the range i.e. outermost values but what about the other values. consider -11,0,0,0,11 and -10,-10,0,10,10
now earlier one has higher range but lower standard deviation.

(2) Sets A and B are both evenly spaced sets.
Evently spaced is oK but what is spacing since that is required to know the deviation.

Both, equal no. of numbers and A has higher range means A has no. with greater spacing so A has more Standard deviation

Re: If sets A and B have the same number of terms, is the [#permalink] 22 May 2012, 08:35

		Similar topics	Author	Replies	Last post
Similar Topics:		A is the first term in a set of consecutive numbers which	batliwala	4	19 Feb 2004, 09:16
		If two sets of numbers, P and Q, have the same number of	pws	4	01 Aug 2006, 17:46
		If two sets of numbers , P and Q, have the same number of	ro86	4	02 Dec 2009, 01:16
		Sets A and B have the same number of terms, is the standard	Stoneface	6	12 Nov 2011, 18:05
	1	Two sets, A and B, have the same number of elements	Aristocrat	3	01 May 2013, 22:55

If sets A and B have the same number of terms, is the

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

If sets A and B have the same number of terms, is the

If sets A and B have the same number of terms, is the

Main navigation

GMAT Resources

Partners

MBA Resources