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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] New post 12 Oct 2004, 19:28
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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 :shock: . Can someone explain it to me? Thank you in advance.
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 [#permalink] New post 12 Oct 2004, 19:43
I would agree D should be the answer
If range is 0, then all 3 terms should be 3
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 [#permalink] New post 16 Oct 2004, 14:35
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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 [#permalink] New post 16 Oct 2004, 15:19
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 .


So the answer is D
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DS:help [#permalink] New post 16 Oct 2004, 15:25
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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 [#permalink] New post 17 Oct 2004, 09:03
Range would be 6 in your example. Agree Largest - Smallest = Range
  [#permalink] 17 Oct 2004, 09:03
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