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

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SVP
Joined: 03 Feb 2003
Posts: 1603

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

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08 Jul 2004, 05:57
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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

Kudos [?]: 303 [0], given: 0

Senior Manager
Joined: 26 Jan 2004
Posts: 400

Kudos [?]: 1 [0], given: 0

Location: India

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08 Jul 2004, 07:30
(D) it is,

Y has highest range, then Z and then X

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Senior Manager
Joined: 19 May 2004
Posts: 291

Kudos [?]: 15 [0], given: 0

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08 Jul 2004, 07:39
Agree. it is D.

Y has the highest SD, and X has the lowest.

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Senior Manager
Joined: 01 May 2004
Posts: 335

Kudos [?]: 115 [0], given: 0

Location: USA

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08 Jul 2004, 07:55
D indeed, Y has the greatest difference among its elements

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Senior Manager
Joined: 25 Dec 2003
Posts: 358

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

Location: India

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09 Jul 2004, 01:40
d for me too..

_________________

Giving another SHOT

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

09 Jul 2004, 01:40
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