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# There is the Q-set consisting of 10 integers. Are they

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SVP
Joined: 03 Feb 2003
Posts: 1607
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Kudos [?]: 87 [0], given: 0

There is the Q-set consisting of 10 integers. Are they [#permalink]  19 May 2003, 23:00
There is the Q-set consisting of 10 integers. Are they equal?

(1) The range of Q is 0.
(2) The standard deviation of Q is 0.
SVP
Joined: 03 Feb 2003
Posts: 1607
Followers: 7

Kudos [?]: 87 [0], given: 0

from either set we know that all numbers are equal.

(1) Range is a difference between the largest and the smallest. If it a zero, they are equal, as are all the rest.

(2) SD is a measure of 'scattering' from the ariphmetic average. If it is a zero, there is no scattering--all numbers are equal to their average. So they are all equal again.
Intern
Joined: 18 Feb 2005
Posts: 47
Followers: 1

Kudos [?]: 6 [0], given: 0

ah...forgot all about the SD funda...
Manager
Joined: 12 Feb 2006
Posts: 71
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Kudos [?]: 2 [0], given: 0

Good question. Had forgotten what range was
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