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Updated on: 02 Mar 2025, 01:59
Originally posted by GMATinsight on 09 Sep 2020, 08:02.
Last edited by Bunuel on 02 Mar 2025, 01:59, edited 4 times in total.
Last edited by Bunuel on 02 Mar 2025, 01:59, edited 4 times in total.
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E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
45%
(medium)
Question Stats:
59% (01:12) correct
41%
(01:04)
wrong
based on 194
sessions
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What is the standard deviation of Set A, which has 9 terms?
1) All distinct terms of Sets A are even
2) The range of Set A is 18
source: https://www.GMATinsight.com
1) All distinct terms of Sets A are even
2) The range of Set A is 18
source: https://www.GMATinsight.com
Archit3110
Major Poster
Updated on: 02 Mar 2025, 01:59
Originally posted by Archit3110 on 10 Sep 2020, 08:36.
Last edited by Bunuel on 02 Mar 2025, 01:59, edited 2 times in total.
Last edited by Bunuel on 02 Mar 2025, 01:59, edited 2 times in total.
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target what is SD of set A
#1
All distinct terms of Sets A are even
set can have all same values or they can be at intervals eg (2,4,6,8,10...) or (2,6,10,12.....)
insufficient
#2
The range of Set A is 18
set can be ( 1,1,1,....1,19) or it can be equally spaced set ( -2,0,2,4,6,8,10,16) or ( 2,2,2,2,...20)
insufficient
from 1 &2
set is even , distinct and range is 18
(2,4,6,8,10,12,14,16,20) ; ( 4,6,8,10,12,14,16,18,22) ; (2,6,8,10,12,14,16,18,20) ;(-2,2,4,6,8,10,12,14,16)
GMATinsight
above cases are possible but they are not dispersed evenly along mean so SD would vary isnt so ? then value of SD wont be same hence E should be correct ?
#1
All distinct terms of Sets A are even
set can have all same values or they can be at intervals eg (2,4,6,8,10...) or (2,6,10,12.....)
insufficient
#2
The range of Set A is 18
set can be ( 1,1,1,....1,19) or it can be equally spaced set ( -2,0,2,4,6,8,10,16) or ( 2,2,2,2,...20)
insufficient
from 1 &2
set is even , distinct and range is 18
(2,4,6,8,10,12,14,16,20) ; ( 4,6,8,10,12,14,16,18,22) ; (2,6,8,10,12,14,16,18,20) ;(-2,2,4,6,8,10,12,14,16)
GMATinsight
above cases are possible but they are not dispersed evenly along mean so SD would vary isnt so ? then value of SD wont be same hence E should be correct ?
GMATinsight
10 Sep 2020, 11:09
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What is meant by distinct terms in the question ???
1) All distinct terms are even .. pls explain
1) All distinct terms are even .. pls explain
