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# There are 3 sets of integers X= Y= Z= SDX, SDY, and

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Joined: 03 Feb 2003
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There are 3 sets of integers X= Y= Z= SDX, SDY, and [#permalink]  08 Jul 2004, 04:57
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0% (00:00) correct 0% (00:00) wrong based on 0 sessions
There are 3 sets of integers
X=[1, 2, 3, 4, 5]
Y=[10, 20, 30, 40, 50]
Z=[2, 3, 5, 7, 11]

SDX, SDY, and SDZ are their standard deviations. Which of the following is correct?

(A) SDX<SDY<SDZ
(B) SDX>SDY>SDZ
(C) SDX=SDY<SDZ
(D) SDX<SDZ<SDY
(E) SDY<SDX<SDZ
Senior Manager
Joined: 26 Jan 2004
Posts: 402
Location: India
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Kudos [?]: 0 [0], given: 0

(D) it is,

Y has highest range, then Z and then X
Senior Manager
Joined: 19 May 2004
Posts: 291
Followers: 1

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

Agree. it is D.

Y has the highest SD, and X has the lowest.
Senior Manager
Joined: 01 May 2004
Posts: 337
Location: USA
Followers: 1

Kudos [?]: 12 [0], given: 0

D indeed, Y has the greatest difference among its elements
Senior Manager
Joined: 25 Dec 2003
Posts: 360
Location: India
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Kudos [?]: 17 [0], given: 0

d for me too..

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