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# given {x,y,z} and if the first data set term is 3, what is

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given {x,y,z} and if the first data set term is 3, what is [#permalink]  12 Oct 2004, 18:28
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given {x,y,z} and if the first data set term is 3, what is the third term?

1. the data set range is 0 (zero)
2. the date set standard deviation is 0 (zero)

The answer given is B. However, I don't understand why 1 alone is not sufficient . Can someone explain it to me? Thank you in advance.
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Joined: 15 Dec 2003
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I would agree D should be the answer
If range is 0, then all 3 terms should be 3
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Paul

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I agree with the OA answer B
If the set is (3,0,-3) the range is zero, so the std dev post would be the only correct ans.
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Joined: 07 Sep 2004
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for {3,0,-3} the range is not zero of course

It is largest - smallest = 3 - (-3) = 6

if range =0 then largest = smallest= 3 .

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DS:help [#permalink]  16 Oct 2004, 14:25
Maneesh,
Range is the difference between the highest and the lowest terms.

in ur example, it is not zero.It is 6

anish

[quote="Maneesh"]I agree with the OA answer B
If the set is (3,0,-3) the range is zero, so the std dev post would be the only correct ans.[/quote]
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Range would be 6 in your example. Agree Largest - Smallest = Range
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