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

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

Y has the highest SD, and X has the lowest.
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08 Jul 2004, 07:55
D indeed, Y has the greatest difference among its elements
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09 Jul 2004, 01:40
d for me too..

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Giving another SHOT

09 Jul 2004, 01:40
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